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   [ ![Denef Cardio](https://cdn.surfking.app/cardio-denef/d4e6c245-799b-4fe6-8dbf-a4a9d5086f07/cardio-denef.png)](/nl) - [ Home ](/nl)
- [ Wie zijn wij ](/nl/wie-zijn-wij)
- [ Cardiologisch onderzoek ](/nl/cardiologisch-onderzoek)
- [ Informatie voor patiënten ](/nl/informatie-voor-patienten)
- [ Praktische info ](/nl/praktische-info)
- [ Contact ](/nl/contact)

  [    016/22.61.62](tel:016226162) [ Online afspraak](https://www.doctena.be/nl/praktijk/leuven/denef-cardio-406325) [   ](tel:016226162)         

 - [ Home ](/nl)
- [ Wie zijn wij ](/nl/wie-zijn-wij)
- [ Cardiologisch onderzoek ](/nl/cardiologisch-onderzoek)
- [ Informatie voor patiënten ](/nl/informatie-voor-patienten)
- [ Praktische info ](/nl/praktische-info)
- [ Contact ](/nl/contact)

  [ Online afspraak](https://www.doctena.be/nl/praktijk/leuven/denef-cardio-406325) [ 016/22.61.62](tel:016226162) 

   Test 
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&lt;!doctype html&gt; &lt;html lang="nl"&gt; &lt;head&gt; &lt;meta charset="utf-8"&gt; &lt;meta name="viewport" content="width=device-width,initial-scale=1"&gt; &lt;title&gt;Denef Cardio · Toestelplanning Prototype&lt;/title&gt; &lt;style&gt; :root{--blue:#1f4e78;--line:#d9e2f3;--text:#1f2937;--rr:#ef8f8f;--ho:#fff200;--hn1:#f39a55;--hnm:#b98ad6;--vascular:#b9dcff;--pacemaker:#bfe8c3} \*{box-sizing:border-box}body{margin:0;font-family:Segoe UI,Arial,sans-serif;background:#eef3f8;color:var(--text)} .app{max-width:1500px;margin:0 auto;padding:18px}.header{background:var(--blue);color:white;border-radius:14px;padding:18px 22px;display:flex;justify-content:space-between;align-items:center;gap:16px} .header h1{margin:0;font-size:23px}.header small{opacity:.85}.controls{display:flex;gap:8px;align-items:center;flex-wrap:wrap} button{border:0;border-radius:9px;padding:9px 13px;font-weight:600;cursor:pointer}.light{background:white;color:var(--blue)}.primary{background:var(--blue);color:white} .weeklabel{font-weight:700;background:#fff2cc;color:#7a4e00;padding:9px 12px;border-radius:9px}.notice{margin:12px 0;background:#fff;padding:10px 14px;border-radius:10px;border-left:4px solid #e4b000} .gridwrap{background:white;border-radius:14px;overflow:auto}.grid{display:grid;grid-template-columns:90px repeat(5,minmax(210px,1fr));min-width:1150px} .cell,.head,.time{border-right:1px solid var(--line);border-bottom:1px solid var(--line)}.head{position:sticky;top:0;z-index:5;background:#d9eaf7;padding:12px;text-align:center;font-weight:700} .time{background:#f8fafc;font-weight:700;text-align:center;padding:12px 5px}.slot{min-height:70px;padding:6px;background:white;cursor:pointer} .slot:hover{background:#f6fbff;box-shadow:inset 0 0 0 2px #8db8d8}.appt{border-radius:9px;padding:7px 8px;margin:2px 0;font-size:13px;line-height:1.25;border:1px solid #0001}.appt strong{display:block} .rr{background:var(--rr)}.ho{background:var(--ho)}.hn1{background:var(--hn1)}.hnm{background:var(--hnm)}.vascular{background:var(--vascular)}.pacemaker{background:var(--pacemaker)} .modalback{position:fixed;inset:0;background:#0007;display:none;align-items:center;justify-content:center;z-index:50}.modal{width:min(520px,94vw);max-height:90vh;overflow-y:auto;background:white;border-radius:16px;padding:20px} .modal h2{margin:0 0 4px}.sub{color:#64748b;margin-bottom:16px}.formgrid{display:grid;grid-template-columns:1fr 1fr;gap:12px} label{font-size:12px;font-weight:700;color:#475569;display:block;margin-bottom:5px}input,select{width:100%;padding:10px;border:1px solid #cbd5e1;border-radius:8px;font:inherit} .full{grid-column:1/-1}.actions{display:flex;justify-content:flex-end;gap:8px;margin-top:16px}.danger{background:#c00000;color:white}.legend{display:flex;gap:10px;flex-wrap:wrap;margin:12px 0}.tag{padding:5px 9px;border-radius:8px;font-size:12px;font-weight:700} .footerhint{font-size:12px;color:#64748b;margin-top:10px} .availability{display:flex;gap:10px;flex-wrap:wrap;margin:12px 0}.stockcard{background:white;border-radius:10px;padding:9px 12px;font-size:13px} .okmsg{margin-top:10px;padding:9px 10px;border-radius:8px;background:#e2f0d9;font-size:13px}.errmsg{margin-top:10px;padding:9px 10px;border-radius:8px;background:#fde8e8;color:#8a0000;font-size:13px;font-weight:700} .appt{cursor:pointer;position:relative}.appt:hover{outline:2px solid #1f4e78} .statuspill{display:inline-block;margin-top:4px;padding:2px 6px;border-radius:10px;background:#ffffffaa;font-size:11px;font-weight:700} .editnote{font-size:11px;color:#64748b;margin-top:4px} .returnbox{display:none;margin-top:12px;padding:12px;background:#f8fafc;border-radius:10px;border:1px solid #d9e2f3} .returngrid{display:grid;grid-template-columns:1fr 1fr;gap:10px} @media print{ body{background:white!important} .header,.notice,.legend,.availability,.gridwrap,.footerhint,#toggleTotals{display:none!important} .app{max-width:none;padding:0} #totalsPanel{display:block!important;box-shadow:none!important;margin:0!important;padding:0!important} #totalsPanel h3{font-size:20px;margin-bottom:4px} #printPeriod{display:block!important;margin-bottom:14px;font-weight:700} #totalsPanel table{font-size:12px} #totalsPanel button{display:none!important} } &lt;/style&gt;&lt;/head&gt; &lt;body&gt; &lt;div class="app"&gt; &lt;div class="header"&gt;&lt;div&gt;&lt;h1&gt;DENEF CARDIO · Toestelplanning&lt;/h1&gt;&lt;small&gt;Webprototype 4P · statistieken gecorrigeerd + maand op plaatsingsdatum&lt;/small&gt;&lt;/div&gt; &lt;div class="controls"&gt;&lt;button class="light" id="prev"&gt;← Vorige week&lt;/button&gt;&lt;div class="weeklabel" id="weekLabel"&gt;&lt;/div&gt;&lt;button class="light" id="next"&gt;Volgende week →&lt;/button&gt;&lt;button class="light" id="today"&gt;Deze week&lt;/button&gt;&lt;/div&gt;&lt;/div&gt; &lt;div class="notice"&gt;&lt;b&gt;Testdoel:&lt;/b&gt; een HN 3 dagen geplaatst op maandag 10:00 staat maandag, dinsdag en woensdag als dag 1/3, 2/3 en 3/3, en verschijnt donderdag 10:00 apart als TERUG. Het toestel blijft daarna nog 30 minuten geblokkeerd voor uitlezen/programmeren.&lt;/div&gt; &lt;div class="legend"&gt;&lt;span class="tag rr"&gt;BD&lt;/span&gt;&lt;span class="tag ho"&gt;HO&lt;/span&gt;&lt;span class="tag hn1"&gt;HN 1 dag&lt;/span&gt;&lt;span class="tag hnm"&gt;HN meerdere dagen&lt;/span&gt;&lt;span class="tag vascular"&gt;Vaatchirurg&lt;/span&gt;&lt;span class="tag pacemaker"&gt;Pacemaker&lt;/span&gt;&lt;/div&gt; &lt;div class="availability"&gt;&lt;div class="stockcard"&gt;&lt;b&gt;2&lt;/b&gt; BD&lt;/div&gt;&lt;div class="stockcard"&gt;&lt;b&gt;3&lt;/b&gt; HO&lt;/div&gt;&lt;div class="stockcard"&gt;&lt;b&gt;3&lt;/b&gt; HN&lt;/div&gt;&lt;div class="stockcard"&gt;&lt;b&gt;30 min&lt;/b&gt; uitlezen/programmeren na terugkomst&lt;/div&gt;&lt;/div&gt; &lt;div style="margin:12px 0"&gt; &lt;button class="primary" id="toggleTotals"&gt;Toon totalen voor Koen&lt;/button&gt; &lt;/div&gt; &lt;div id="totalsPanel" style="display:none;background:white;border-radius:14px;padding:16px;margin:12px 0;box-shadow:0 8px 24px #0001"&gt; &lt;div style="display:flex;justify-content:space-between;align-items:center;gap:12px"&gt; &lt;h3 style="margin:0"&gt;Denef Cardio · Toestelstatistieken&lt;/h3&gt; &lt;button class="primary" id="printTotals"&gt;Afdrukken&lt;/button&gt; &lt;/div&gt; &lt;div id="printPeriod" style="margin-top:6px;font-weight:700"&gt;&lt;/div&gt; &lt;div class="editnote"&gt;Tellingen zijn gebaseerd op de plaatsingsdatum van de afspraak.&lt;/div&gt; &lt;div style="display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:12px"&gt; &lt;div&gt; &lt;h4 style="margin:0 0 8px"&gt;Per toestel&lt;/h4&gt; &lt;table style="width:100%;border-collapse:collapse" id="deviceTotals"&gt;&lt;/table&gt; &lt;/div&gt; &lt;div&gt; &lt;h4 style="margin:0 0 8px"&gt;Per arts&lt;/h4&gt; &lt;table style="width:100%;border-collapse:collapse" id="doctorTotals"&gt;&lt;/table&gt; &lt;/div&gt; &lt;/div&gt; &lt;div style="margin-top:20px"&gt; &lt;h4 style="margin:0 0 5px"&gt;Weekoverzicht per arts en toestel&lt;/h4&gt; &lt;div class="editnote"&gt;BDM apart · 1-dags Holters = HO + HN1 · meerdaagse Holters = HN2 t/m HN7.&lt;/div&gt; &lt;table style="width:100%;border-collapse:collapse;margin-top:8px" id="doctorDeviceWeek"&gt;&lt;/table&gt; &lt;/div&gt; &lt;div style="margin-top:20px"&gt; &lt;h4 style="margin:0 0 5px"&gt;Maandoverzicht per arts en toestel&lt;/h4&gt; &lt;div class="editnote"&gt;HO = gewone HO + HN 1 dag. HN = HN vanaf 2 t/m 7 dagen.&lt;/div&gt; &lt;table style="width:100%;border-collapse:collapse;margin-top:8px" id="doctorDeviceMonth"&gt;&lt;/table&gt; &lt;/div&gt; &lt;div style="margin-top:22px"&gt; &lt;h4 style="margin:0 0 5px"&gt;Maandoverzicht analyses HO / HN&lt;/h4&gt; &lt;div class="editnote"&gt;1 toestel = 1 analyse. HO = gewone HO + HN 1 dag. HN = HN vanaf 2 t/m 7 dagen. BD wordt hier niet meegeteld.&lt;/div&gt; &lt;table style="width:100%;border-collapse:collapse;margin-top:8px" id="analysisMonth"&gt;&lt;/table&gt; &lt;/div&gt; &lt;/div&gt; &lt;div class="gridwrap"&gt;&lt;div class="grid" id="grid"&gt;&lt;/div&gt;&lt;/div&gt; &lt;div class="footerhint"&gt;Afspraken worden voorlopig alleen op deze computer in de browser bewaard. Dit is nog geen definitieve praktijkdatabase.&lt;/div&gt; &lt;/div&gt; &lt;div class="modalback" id="modalBack"&gt;&lt;div class="modal"&gt;&lt;h2&gt;Nieuwe afspraak&lt;/h2&gt;&lt;div class="sub" id="chosenSlot"&gt;&lt;/div&gt; &lt;div class="formgrid"&gt; &lt;div&gt;&lt;label&gt;Toestel&lt;/label&gt;&lt;select id="device"&gt;&lt;option&gt;BD&lt;/option&gt;&lt;option&gt;HO&lt;/option&gt;&lt;option&gt;HN 1 dag&lt;/option&gt;&lt;option&gt;HN 2 dagen&lt;/option&gt;&lt;option&gt;HN 3 dagen&lt;/option&gt;&lt;option&gt;HN 4 dagen&lt;/option&gt;&lt;option&gt;HN 5 dagen&lt;/option&gt;&lt;option&gt;HN 6 dagen&lt;/option&gt;&lt;option&gt;HN 7 dagen&lt;/option&gt;&lt;option&gt;Vaatchirurg&lt;/option&gt;&lt;option&gt;Pacemaker&lt;/option&gt;&lt;/select&gt;&lt;/div&gt; &lt;div&gt;&lt;label&gt;Status&lt;/label&gt;&lt;select id="status"&gt;&lt;option&gt;Gepland&lt;/option&gt;&lt;option&gt;Geplaatst&lt;/option&gt;&lt;option&gt;Terug&lt;/option&gt;&lt;/select&gt;&lt;/div&gt; &lt;div class="full"&gt;&lt;label&gt;Naam patiënt&lt;/label&gt;&lt;input id="patient"&gt;&lt;/div&gt; &lt;div&gt;&lt;label&gt;Geboortedatum&lt;/label&gt;&lt;input id="dob" type="date"&gt;&lt;/div&gt; &lt;div&gt;&lt;label&gt;Arts&lt;/label&gt;&lt;select id="doctor"&gt;&lt;option&gt;KD&lt;/option&gt;&lt;option&gt;GVT&lt;/option&gt;&lt;option&gt;AV&lt;/option&gt;&lt;option&gt;JE&lt;/option&gt;&lt;option&gt;LC&lt;/option&gt;&lt;option&gt;Andere&lt;/option&gt;&lt;/select&gt;&lt;/div&gt; &lt;div class="full returnbox"&gt; &lt;b&gt;Afgesproken retour&lt;/b&gt; &lt;div class="editnote"&gt;Automatisch ingevuld volgens het toestel. Pas dit meteen aan als de patiënt later of vroeger terugkomt. Het toestel blijft daarna nog 30 minuten geblokkeerd.&lt;/div&gt; &lt;div class="returngrid" style="margin-top:10px"&gt; &lt;div&gt;&lt;label&gt;Retourdatum&lt;/label&gt;&lt;input id="newReturnDate" type="date"&gt;&lt;/div&gt; &lt;div&gt;&lt;label&gt;Retourtijd&lt;/label&gt;&lt;input id="newReturnTime" type="time" step="1800"&gt;&lt;/div&gt; &lt;/div&gt; &lt;/div&gt; &lt;/div&gt; &lt;div id="availabilityMsg" class="okmsg"&gt;Beschikbaarheid wordt gecontroleerd.&lt;/div&gt;&lt;div class="actions"&gt;&lt;button id="cancel"&gt;Annuleren&lt;/button&gt;&lt;button class="primary" id="save"&gt;Opslaan&lt;/button&gt;&lt;/div&gt; &lt;/div&gt;&lt;/div&gt; &lt;div class="modalback" id="editBack"&gt; &lt;div class="modal"&gt; &lt;h2&gt;Afspraak wijzigen / verplaatsen&lt;/h2&gt; &lt;div class="sub" id="editInfo"&gt;&lt;/div&gt; &lt;div class="formgrid"&gt; &lt;div&gt;&lt;label&gt;Datum&lt;/label&gt;&lt;input id="editDate" type="date"&gt;&lt;/div&gt; &lt;div&gt;&lt;label&gt;Tijd&lt;/label&gt; &lt;select id="editTime"&gt; &lt;option&gt;08:00&lt;/option&gt;&lt;option&gt;08:30&lt;/option&gt;&lt;option&gt;09:00&lt;/option&gt;&lt;option&gt;09:30&lt;/option&gt;&lt;option&gt;10:00&lt;/option&gt; &lt;option&gt;10:30&lt;/option&gt;&lt;option&gt;11:00&lt;/option&gt;&lt;option&gt;11:30&lt;/option&gt;&lt;option&gt;12:00&lt;/option&gt; &lt;option&gt;12:30&lt;/option&gt;&lt;option&gt;13:00&lt;/option&gt;&lt;option&gt;13:30&lt;/option&gt;&lt;option&gt;14:00&lt;/option&gt; &lt;option&gt;14:30&lt;/option&gt;&lt;option&gt;15:00&lt;/option&gt;&lt;option&gt;15:30&lt;/option&gt;&lt;option&gt;16:00&lt;/option&gt; &lt;/select&gt; &lt;/div&gt; &lt;div&gt;&lt;label&gt;Toestel&lt;/label&gt; &lt;select id="editDevice"&gt; &lt;option&gt;BD&lt;/option&gt;&lt;option&gt;HO&lt;/option&gt;&lt;option&gt;HN 1 dag&lt;/option&gt;&lt;option&gt;HN 2 dagen&lt;/option&gt; &lt;option&gt;HN 3 dagen&lt;/option&gt;&lt;option&gt;HN 4 dagen&lt;/option&gt;&lt;option&gt;HN 5 dagen&lt;/option&gt;&lt;option&gt;HN 6 dagen&lt;/option&gt;&lt;option&gt;HN 7 dagen&lt;/option&gt;&lt;option&gt;Vaatchirurg&lt;/option&gt;&lt;option&gt;Pacemaker&lt;/option&gt; &lt;/select&gt; &lt;/div&gt; &lt;div&gt;&lt;label&gt;Status&lt;/label&gt; &lt;select id="editStatus"&gt; &lt;option&gt;Gepland&lt;/option&gt;&lt;option&gt;Geplaatst&lt;/option&gt;&lt;option&gt;Terug&lt;/option&gt; &lt;/select&gt; &lt;/div&gt; &lt;div class="full"&gt;&lt;label&gt;Naam patiënt&lt;/label&gt;&lt;input id="editPatient"&gt;&lt;/div&gt; &lt;div&gt;&lt;label&gt;Geboortedatum&lt;/label&gt;&lt;input id="editDob" type="date"&gt;&lt;/div&gt; &lt;div&gt;&lt;label&gt;Arts&lt;/label&gt; &lt;select id="editDoctor"&gt; &lt;option&gt;KD&lt;/option&gt;&lt;option&gt;GVT&lt;/option&gt;&lt;option&gt;AV&lt;/option&gt;&lt;option&gt;JE&lt;/option&gt;&lt;option&gt;LC&lt;/option&gt;&lt;option&gt;Andere&lt;/option&gt; &lt;/select&gt; &lt;/div&gt; &lt;div id="analysisField"&gt;&lt;label&gt;Geanalyseerd door&lt;/label&gt; &lt;select id="editAnalyzedBy"&gt; &lt;option value=""&gt;Nog niet geanalyseerd&lt;/option&gt; &lt;option&gt;KD&lt;/option&gt;&lt;option&gt;GVT&lt;/option&gt;&lt;option&gt;AV&lt;/option&gt;&lt;option&gt;JE&lt;/option&gt;&lt;option&gt;LC&lt;/option&gt; &lt;option&gt;Papa Denef&lt;/option&gt;&lt;option&gt;Andere&lt;/option&gt; &lt;/select&gt; &lt;/div&gt; &lt;/div&gt; &lt;div id="editAvailability" class="okmsg" style="margin-top:12px"&gt;&lt;/div&gt; &lt;div class="returnbox" id="returnBox"&gt; &lt;b&gt;Afgesproken retour&lt;/b&gt; &lt;div class="editnote"&gt;Standaard wordt de retour automatisch berekend. Pas datum/tijd alleen aan als de patiënt op een ander moment terugbrengt. Daarna blijft het toestel nog 30 minuten geblokkeerd voor uitlezen/programmeren.&lt;/div&gt; &lt;div class="returngrid" style="margin-top:10px"&gt; &lt;div&gt;&lt;label&gt;Retourdatum&lt;/label&gt;&lt;input id="returnDate" type="date"&gt;&lt;/div&gt; &lt;div&gt;&lt;label&gt;Retourtijd&lt;/label&gt;&lt;input id="returnTime" type="time" step="1800"&gt;&lt;/div&gt; &lt;/div&gt; &lt;/div&gt; &lt;div class="actions" style="justify-content:space-between"&gt; &lt;button class="danger" id="deleteAppt"&gt;Verwijderen&lt;/button&gt; &lt;div style="display:flex;gap:8px"&gt; &lt;button id="editCancel"&gt;Annuleren&lt;/button&gt; &lt;button class="primary" id="editSave"&gt;Wijziging opslaan&lt;/button&gt; &lt;/div&gt; &lt;/div&gt; &lt;/div&gt; &lt;/div&gt; &lt;script&gt; const times=\["08:00","08:30","09:00","09:30","10:00","10:30","11:00","11:30","12:00","12:30","13:00","13:30","14:00","14:30","15:00","15:30","16:00"\], days=\["Maandag","Dinsdag","Woensdag","Donderdag","Vrijdag"\], KEY="denef\_cardio\_proto\_v4h", OLDKEY="denef\_cardio\_proto\_v4g", STOCK={BD:2,HO:3,HN:3}; let creatingNew=false; let appointments=JSON.parse(localStorage.getItem(KEY)||localStorage.getItem(OLDKEY)||"\[\]"); appointments=appointments.map(a=&gt;({...a,device:a.device==="RR"?"BD":a.device,analyzedBy:a.analyzedBy||""})); localStorage.setItem(KEY,JSON.stringify(appointments)); let currentMonday=getMonday(new Date()),selected=null,editingId=null; function getMonday(d){d=new Date(d);d.setHours(0,0,0,0);const x=d.getDay()||7;d.setDate(d.getDate()-x+1);return d} function iso(d){const y=d.getFullYear(),m=String(d.getMonth()+1).padStart(2,"0"),x=String(d.getDate()).padStart(2,"0");return `${y}-${m}-${x}`} function fd(d){return d.toLocaleDateString("nl-BE",{day:"2-digit",month:"2-digit",year:"numeric"})} function fs(d){return d.toLocaleDateString("nl-BE",{day:"2-digit",month:"2-digit"})} function isSpecial(x){return x==="Vaatchirurg"||x==="Pacemaker"} function cls(x){return x==="BD"?"rr":x==="HO"?"ho":x==="HN 1 dag"?"hn1":x==="Vaatchirurg"?"vascular":x==="Pacemaker"?"pacemaker":"hnm"} function grp(x){return x==="BD"?"BD":x==="HO"?"HO":x.startsWith("HN")?"HN":"SPECIAL"} function dur(x){const m=x.match(/HN (\\d+) dag/);return m?+m\[1\]:1} function esc(s){return String(s||"").replace(/\[&amp;&lt;&gt;"'\]/g,m=&gt;({"&amp;":"&amp;amp;","&lt;":"&amp;lt;","&gt;":"&amp;gt;",'"':"&amp;quot;","'":"&amp;#39;"}\[m\]))} function dob(s){if(!s)return"";const \[y,m,d\]=s.split("-");return`${d}/${m}/${y}`} function dt(d,t){return new Date(`${d}T${t}:00`)} function plannedEnd(a){ const e=dt(a.date,a.time); if(isSpecial(a.device)){e.setMinutes(e.getMinutes()+30);return e} e.setDate(e.getDate()+dur(a.device));e.setMinutes(e.getMinutes()+30);return e } function actualEnd(a){ if(a.returnDate&amp;&amp;a.returnTime){ const e=dt(a.returnDate,a.returnTime);e.setMinutes(e.getMinutes()+30);return e } return plannedEnd(a) } function candidateEnd(dev,date,time,returnDate="",returnTime=""){ return actualEnd({date,time,device:dev,returnDate,returnTime}) } function overlap(s1,e1,s2,e2){return s1&lt;e2&amp;&amp;s2&lt;e1} /\* Controleer de echte capaciteit op elk relevant moment. Een kandidaat bezet 1 toestel van plaatsing tot retour + 30 min. We bekijken alle start/eindmomenten binnen die periode en tellen hoeveel bestaande afspraken tegelijk actief zijn. \*/ function capacityCheck(dev,date,time,returnDate="",returnTime="",excludeId=null){ if(isSpecial(dev)) return {ok:true,freeAtWorst:0,stock:0,conflictAt:null,end:dt(date,time)}; const g=grp(dev), stock=STOCK\[g\]; const start=dt(date,time), end=candidateEnd(dev,date,time,returnDate,returnTime); const same=appointments.filter(a=&gt; a.id!==excludeId &amp;&amp; grp(a.device)===g &amp;&amp; overlap(start,end,dt(a.date,a.time),actualEnd(a)) ); const points=\[start,end\]; for(const a of same){ const as=dt(a.date,a.time), ae=actualEnd(a); if(as&gt;start &amp;&amp; as&lt;end) points.push(as); if(ae&gt;start &amp;&amp; ae&lt;end) points.push(ae); } points.sort((a,b)=&gt;a-b); let worstUsed=0, conflictAt=null; for(const p of points){ if(p&gt;=end) continue; const used=same.filter(a=&gt;dt(a.date,a.time)&lt;=p &amp;&amp; actualEnd(a)&gt;p).length; if(used&gt;worstUsed){worstUsed=used;conflictAt=new Date(p)} } return{ ok: worstUsed &lt; stock, freeAtWorst: stock-worstUsed, stock, conflictAt, end } } function avail(dev,date,time,excludeId=null){ const c=capacityCheck(dev,date,time,"","",excludeId); return{free:c.freeAtWorst,stock:c.stock,ok:c.ok,conflictAt:c.conflictAt} } function dayNumber(dateStr){ const \[y,m,d\]=dateStr.split("-").map(Number); return Date.UTC(y,m-1,d)/86400000 } function occ(a,date){ const diff=dayNumber(date)-dayNumber(a.date); return diff&gt;=0&amp;&amp;diff&lt;dur(a.device)?diff+1:0 } function plannedReturnDate(a){ const d=dt(a.date,a.time); d.setDate(d.getDate()+dur(a.device)); return iso(d) } function render(){ const g=document.getElementById("grid");g.innerHTML='&lt;div class="head"&gt;Tijd&lt;/div&gt;'; for(let i=0;i&lt;5;i++){const d=new Date(currentMonday);d.setDate(d.getDate()+i);g.innerHTML+=`&lt;div class="head"&gt;${days\[i\]}&lt;br&gt;${fs(d)}&lt;/div&gt;`} for(const t of times){ g.innerHTML+=`&lt;div class="time"&gt;${t}&lt;/div&gt;`; for(let i=0;i&lt;5;i++){ const d=new Date(currentMonday);d.setDate(d.getDate()+i);const date=iso(d); const apps=appointments.filter(a=&gt;a.time===t&amp;&amp;occ(a,date)&gt;0); const returns=appointments.filter(a=&gt;{if(isSpecial(a.device))return false;const rd=a.returnDate||plannedReturnDate(a),rt=a.returnTime||a.time;return rt===t&amp;&amp;dur(a.device)&gt;1&amp;&amp;rd===date}); let h=`&lt;div class="slot" data-date="${date}" data-time="${t}"&gt;`; for(const a of apps){ const n=occ(a,date),du=dur(a.device); const retour=a.returnDate&amp;&amp;a.returnTime?`&lt;br&gt;&lt;small&gt;Werkelijk terug: ${a.returnDate.split("-").reverse().join("/")} ${a.returnTime} · vrij ${formatFreeTime(a)}&lt;/small&gt;`:""; if(isSpecial(a.device)){ h+=`&lt;div class="appt ${cls(a.device)}" data-id="${a.id}"&gt;&lt;strong&gt;${a.device}&lt;/strong&gt;&lt;span class="statuspill"&gt;Reminder&lt;/span&gt;&lt;/div&gt;`; continue; } const analyse=a.device!=="BD"?(a.analyzedBy?`&lt;br&gt;&lt;small&gt;&lt;b&gt;Analyse: ${esc(a.analyzedBy)} ✓&lt;/b&gt;&lt;/small&gt;`:`&lt;br&gt;&lt;small&gt;Analyse: nog open&lt;/small&gt;`):""; h+=`&lt;div class="appt ${cls(a.device)}" data-id="${a.id}"&gt;&lt;strong&gt;${a.device}${du&gt;1?` · dag ${n}/${du}`:""}&lt;/strong&gt;${esc(a.patient)} · ${dob(a.dob)} · ${esc(a.doctor)}&lt;br&gt;&lt;span class="statuspill"&gt;${a.status}&lt;/span&gt;${retour}${analyse}&lt;/div&gt;` } for(const a of returns){ h+=`&lt;div class="appt ${cls(a.device)}" data-id="${a.id}" style="border-style:dashed"&gt;&lt;strong&gt;${a.device} · TERUG&lt;/strong&gt;${esc(a.patient)} · ${esc(a.doctor)}&lt;br&gt;&lt;small&gt;${a.returnDate&amp;&amp;a.returnTime?"Afgesproken terug":"Gepland terug"} ${a.returnTime||a.time} · toestel vrij vanaf ${(()=&gt;{const x=dt(date,a.returnTime||a.time);x.setMinutes(x.getMinutes()+30);return x.toLocaleTimeString("nl-BE",{hour:"2-digit",minute:"2-digit"})})()}&lt;/small&gt;&lt;/div&gt;` } g.innerHTML+=h+"&lt;/div&gt;" } } document.querySelectorAll(".slot").forEach(e=&gt;e.onclick=ev=&gt;{if(!ev.target.closest(".appt"))openM(e.dataset.date,e.dataset.time)}); document.querySelectorAll(".appt").forEach(e=&gt;e.onclick=ev=&gt;{ev.stopPropagation();openEdit(Number(e.dataset.id))}); const z=new Date(currentMonday);z.setDate(z.getDate()+4); document.getElementById("weekLabel").textContent=`${fd(currentMonday)} – ${fd(z)}`; renderTotals(); } function formatFreeTime(a){ const e=actualEnd(a); return e.toLocaleDateString("nl-BE",{day:"2-digit",month:"2-digit"})+" "+e.toLocaleTimeString("nl-BE",{hour:"2-digit",minute:"2-digit"}) } function defaultReturnForNew(){ if(!selected)return; const dev=document.getElementById("device").value; const e=dt(selected.date,selected.time); e.setDate(e.getDate()+dur(dev)); document.getElementById("newReturnDate").value=iso(e); document.getElementById("newReturnTime").value=selected.time; } function msg(){ if(!selected)return; const dev=document.getElementById("device").value, rd=document.getElementById("newReturnDate").value, rt=document.getElementById("newReturnTime").value, a=capacityCheck(dev,selected.date,selected.time,rd,rt), e=document.getElementById("availabilityMsg"); if(!rd||!rt){e.className="errmsg";e.textContent="Vul retourdatum en retourtijd in.";return} if(dt(rd,rt)&lt;dt(selected.date,selected.time)){e.className="errmsg";e.textContent="De retourtijd kan niet vóór de plaatsing liggen.";return} if(!a.ok){e.className="errmsg";e.textContent=`Geen ${grp(dev)}-toestel beschikbaar gedurende de volledige reservatieperiode.`} else{e.className="okmsg";e.textContent=a.freeAtWorst===1?`Nog 1 ${grp(dev)}-toestel beschikbaar gedurende de volledige reservatieperiode.`:`${a.freeAtWorst} ${grp(dev)}-toestellen beschikbaar gedurende de volledige reservatieperiode.`} } function openM(date,time){ selected={date,time}; creatingNew=true; editingId=null; document.querySelector("#editBack h2").textContent="Nieuwe afspraak"; document.getElementById("editInfo").textContent=`${date.split("-").reverse().join("/")} om ${time}`; document.getElementById("editDate").value=date; document.getElementById("editTime").value=time; document.getElementById("editDevice").value="BD"; document.getElementById("editStatus").value="Gepland"; document.getElementById("editPatient").value=""; document.getElementById("editDob").value=""; document.getElementById("editDoctor").value="KD"; document.getElementById("editAnalyzedBy").value=""; const tmp={date,time,device:"BD"}; document.getElementById("returnDate").value=plannedReturnDate(tmp); document.getElementById("returnTime").value=time; document.getElementById("deleteAppt").style.display="none"; document.getElementById("editSave").textContent="Opslaan"; toggleReturn();toggleAnalysis();editAvailMessage(); document.getElementById("editBack").style.display="flex" } function closeM(){document.getElementById("modalBack").style.display="none";selected=null} document.getElementById("device").onchange=()=&gt;{defaultReturnForNew();msg()}; document.getElementById("newReturnDate").onchange=msg; document.getElementById("newReturnTime").onchange=msg; document.getElementById("save").onclick=()=&gt;{ const p=document.getElementById("patient").value.trim(), d=document.getElementById("dob").value, dev=document.getElementById("device").value; if(!p||!d){alert("Vul naam patiënt en geboortedatum in.");return} const rd=document.getElementById("newReturnDate").value, rt=document.getElementById("newReturnTime").value; if(!rd||!rt){alert("Vul retourdatum en retourtijd in.");return} if(dt(rd,rt)&lt;dt(selected.date,selected.time)){alert("De retourtijd kan niet vóór de plaatsing liggen.");return} const a=capacityCheck(dev,selected.date,selected.time,rd,rt); if(!a.ok){alert(`Geen ${grp(dev)}-toestel beschikbaar gedurende de volledige reservatieperiode. De afspraak wordt niet opgeslagen.`);return} const auto=new Date(dt(selected.date,selected.time)); auto.setDate(auto.getDate()+dur(dev)); const autoDate=iso(auto); appointments.push({id:Date.now(),date:selected.date,time:selected.time,device:dev,patient:p,dob:d,doctor:document.getElementById("doctor").value,status:document.getElementById("status").value,returnDate:(rd===autoDate&amp;&amp;rt===selected.time)?"":rd,returnTime:(rd===autoDate&amp;&amp;rt===selected.time)?"":rt}); saveAll();closeM();render() }; document.getElementById("cancel").onclick=closeM; document.getElementById("modalBack").onclick=e=&gt;{if(e.target.id==="modalBack")closeM()}; function editAvailMessage(){ if(!editingId&amp;&amp;!creatingNew)return; const dev=document.getElementById("editDevice").value; const date=document.getElementById("editDate").value; const time=document.getElementById("editTime").value; const rd=document.getElementById("returnDate").value; const rt=document.getElementById("returnTime").value; const el=document.getElementById("editAvailability"); if(!date||!time){el.className="errmsg";el.textContent="Kies datum en tijd.";return} if(isSpecial(dev)){el.className="okmsg";el.textContent="Reminder: telt niet mee als toestel en heeft geen capaciteitscontrole.";return} const a=capacityCheck(dev,date,time,rd,rt,editingId); if(!a.ok){el.className="errmsg";el.textContent=`Niet mogelijk: alle ${a.stock} ${grp(dev)}-toestellen zijn tegelijk bezet binnen deze reservatieperiode.`} else if(a.freeAtWorst===1){el.className="okmsg";el.textContent=`Nog 1 ${grp(dev)}-toestel beschikbaar gedurende deze reservatieperiode.`} else{el.className="okmsg";el.textContent=`${a.freeAtWorst} ${grp(dev)}-toestellen beschikbaar gedurende deze reservatieperiode.`} } function openEdit(id){ creatingNew=false; const a=appointments.find(x=&gt;x.id===id);if(!a)return;editingId=id; document.querySelector("#editBack h2").textContent="Afspraak wijzigen / verplaatsen"; document.getElementById("deleteAppt").style.display=""; document.getElementById("editSave").textContent="Wijziging opslaan"; document.getElementById("editInfo").textContent=`${a.device} · ${a.patient}`; document.getElementById("editDate").value=a.date; document.getElementById("editTime").value=a.time; document.getElementById("editDevice").value=a.device; document.getElementById("editPatient").value=a.patient; document.getElementById("editDob").value=a.dob; document.getElementById("editDoctor").value=a.doctor; document.getElementById("editStatus").value=a.status; document.getElementById("editAnalyzedBy").value=a.analyzedBy||""; document.getElementById("returnDate").value=isSpecial(a.device)?"":(a.returnDate||plannedReturnDate(a)); document.getElementById("returnTime").value=isSpecial(a.device)?"":(a.returnTime||a.time); toggleReturn();toggleAnalysis();editAvailMessage(); document.getElementById("editBack").style.display="flex" } function toggleReturn(){ const dev=document.getElementById("editDevice").value; document.getElementById("returnBox").style.display=isSpecial(dev)?"none":"block" } function toggleAnalysis(){ const dev=document.getElementById("editDevice").value; const show=dev!=="BD" &amp;&amp; !isSpecial(dev); document.getElementById("analysisField").style.display=show?"block":"none"; if(!show)document.getElementById("editAnalyzedBy").value=""; } function resetCreateReturn(){ if(!creatingNew)return; const date=document.getElementById("editDate").value,time=document.getElementById("editTime").value,dev=document.getElementById("editDevice").value; if(!date||!time)return; document.getElementById("returnDate").value=plannedReturnDate({date,time,device:dev}); document.getElementById("returnTime").value=time; } function closeEdit(){document.getElementById("editBack").style.display="none";editingId=null;creatingNew=false;selected=null} document.getElementById("editStatus").onchange=toggleReturn; document.getElementById("editDate").onchange=()=&gt;{if(creatingNew)resetCreateReturn();editAvailMessage()}; document.getElementById("editTime").onchange=()=&gt;{if(creatingNew)resetCreateReturn();editAvailMessage()}; document.getElementById("editDevice").onchange=()=&gt;{if(creatingNew&amp;&amp;!isSpecial(document.getElementById("editDevice").value))resetCreateReturn();editAvailMessage();toggleAnalysis();toggleReturn()}; document.getElementById("returnDate").onchange=editAvailMessage; document.getElementById("returnTime").onchange=editAvailMessage; document.getElementById("editCancel").onclick=closeEdit; document.getElementById("editBack").onclick=e=&gt;{if(e.target.id==="editBack")closeEdit()}; document.getElementById("editSave").onclick=()=&gt;{ const newDate=document.getElementById("editDate").value; const newTime=document.getElementById("editTime").value; const newDevice=document.getElementById("editDevice").value; const newPatient=document.getElementById("editPatient").value.trim(); const newDob=document.getElementById("editDob").value; const newDoctor=document.getElementById("editDoctor").value; const st=document.getElementById("editStatus").value; if(!newDate||!newTime){alert("Vul datum en tijd in.");return} const special=isSpecial(newDevice); if(!special &amp;&amp; (!newPatient||!newDob)){alert("Vul patiënt en geboortedatum in.");return} const rd=document.getElementById("returnDate").value,rt=document.getElementById("returnTime").value; if(!special){ if(!rd||!rt){alert("Vul retourdatum en retourtijd in.");return} if(dt(rd,rt)&lt;dt(newDate,newTime)){alert("De retourtijd kan niet vóór de plaatsing liggen.");return} const exclude=creatingNew?null:editingId; const check=capacityCheck(newDevice,newDate,newTime,rd,rt,exclude); if(!check.ok){alert(`Niet mogelijk: alle ${check.stock} ${grp(newDevice)}-toestellen zijn tegelijk bezet binnen de gekozen reservatieperiode.`);return} } const data={ date:newDate,time:newTime,device:newDevice, patient:special?newDevice:newPatient,dob:special?"":newDob,doctor:special?"":newDoctor,status:special?"Gepland":st, analyzedBy:special||newDevice==="BD"?"":document.getElementById("editAnalyzedBy").value }; if(special){data.returnDate="";data.returnTime=""} else{ const autoDate=plannedReturnDate(data); data.returnDate=(rd===autoDate&amp;&amp;rt===newTime)?"":rd; data.returnTime=(rd===autoDate&amp;&amp;rt===newTime)?"":rt; } if(creatingNew){ appointments.push({id:Date.now(),...data}); }else{ const a=appointments.find(x=&gt;x.id===editingId);if(!a)return; Object.assign(a,data); } saveAll();closeEdit();render() }; document.getElementById("deleteAppt").onclick=()=&gt;{ const a=appointments.find(x=&gt;x.id===editingId);if(!a)return; if(!confirm(`Afspraak van ${a.patient} verwijderen?`))return; appointments=appointments.filter(x=&gt;x.id!==editingId); saveAll();closeEdit();render() }; function inRange(date,start,end){const x=new Date(`${date}T00:00:00`);return x&gt;=start&amp;&amp;x&lt;end} function startOfMonth(d){return new Date(d.getFullYear(),d.getMonth(),1)} function nextMonth(d){return new Date(d.getFullYear(),d.getMonth()+1,1)} function countFor(filter,start,end){return appointments.filter(a=&gt;filter(a)&amp;&amp;inRange(a.date,start,end)).length} function statCat(a){ if(isSpecial(a.device)) return "SPECIAL"; if(a.device==="BD") return "BD"; if(a.device==="HO" || a.device==="HN 1 dag") return "ONE"; if(/^HN \[2-7\] dag/.test(a.device)) return "MULTI"; return "OTHER"; } function renderDoctorDeviceTable(start,end){ const doctors=\["KD","GVT","AV","JE","LC","Andere"\]; let h='&lt;tr&gt;&lt;th style="text-align:left;padding:7px;border-bottom:1px solid #ddd"&gt;Arts&lt;/th&gt;&lt;th style="padding:7px;border-bottom:1px solid #ddd"&gt;BD&lt;/th&gt;&lt;th style="padding:7px;border-bottom:1px solid #ddd"&gt;1-dags Holters&lt;/th&gt;&lt;th style="padding:7px;border-bottom:1px solid #ddd"&gt;Meerdaagse Holters&lt;/th&gt;&lt;th style="padding:7px;border-bottom:1px solid #ddd"&gt;Totaal&lt;/th&gt;&lt;/tr&gt;'; for(const doc of doctors){ const bd=countFor(a=&gt;a.doctor===doc &amp;&amp; statCat(a)==="BD",start,end); const one=countFor(a=&gt;a.doctor===doc &amp;&amp; statCat(a)==="ONE",start,end); const multi=countFor(a=&gt;a.doctor===doc &amp;&amp; statCat(a)==="MULTI",start,end); h+=`&lt;tr&gt;&lt;td style="padding:7px;border-bottom:1px solid #eee;font-weight:700"&gt;${doc}&lt;/td&gt;&lt;td style="text-align:center;border-bottom:1px solid #eee"&gt;${bd}&lt;/td&gt;&lt;td style="text-align:center;border-bottom:1px solid #eee"&gt;${one}&lt;/td&gt;&lt;td style="text-align:center;border-bottom:1px solid #eee"&gt;${multi}&lt;/td&gt;&lt;td style="text-align:center;border-bottom:1px solid #eee;font-weight:700"&gt;${bd+one+multi}&lt;/td&gt;&lt;/tr&gt;`; } return h; } function renderTotals(){ const weekStart=new Date(currentMonday),weekEnd=new Date(currentMonday);weekEnd.setDate(weekEnd.getDate()+7); /\* Een overgangsweek hoort voor de maandstatistiek bij de maand waarin de meeste werkdagen (ma-vr) van die week vallen. 31/08–06/09 =&gt; september. \*/ // Maandstatistieken volgen de kalendermaand van de plaatsingsdatum. // Bij een overgangsweek (bv. 31/08–06/09) blijft 31/08 dus augustus; // september wordt als maand getoond vanaf de week die in september start. const monthStart=startOfMonth(currentMonday),monthEnd=nextMonth(currentMonday); const doctors=\["KD","GVT","AV","JE","LC","Andere"\]; /\* Eén bron voor ALLE statistieken: alleen echte plaatsingen, geteld op plaatsingsdatum. Zo kunnen weektabel, per toestel en per arts nooit verschillende logica gebruiken. \*/ const realAppointments=appointments.filter(a=&gt;!isSpecial(a.device)); const slice=(start,end)=&gt;realAppointments.filter(a=&gt;inRange(a.date,start,end)); const weekApps=slice(weekStart,weekEnd), monthApps=slice(monthStart,monthEnd); const catCount=(arr,cat)=&gt;arr.filter(a=&gt;statCat(a)===cat).length; const docCount=(arr,doc)=&gt;arr.filter(a=&gt;a.doctor===doc).length; let t='&lt;tr&gt;&lt;th style="text-align:left;padding:6px;border-bottom:1px solid #ddd"&gt;Categorie&lt;/th&gt;&lt;th style="padding:6px;border-bottom:1px solid #ddd"&gt;Week&lt;/th&gt;&lt;th style="padding:6px;border-bottom:1px solid #ddd"&gt;Maand&lt;/th&gt;&lt;/tr&gt;'; const groups=\[\["BDM","BD"\],\["1-dags Holters (HO + HN1)","ONE"\],\["Meerdaagse Holters (HN2–HN7)","MULTI"\]\]; for(const \[label,cat\] of groups){ t+=`&lt;tr&gt;&lt;td style="padding:7px;border-bottom:1px solid #eee;font-weight:700"&gt;${label}&lt;/td&gt;&lt;td style="text-align:center;border-bottom:1px solid #eee"&gt;${catCount(weekApps,cat)}&lt;/td&gt;&lt;td style="text-align:center;border-bottom:1px solid #eee"&gt;${catCount(monthApps,cat)}&lt;/td&gt;&lt;/tr&gt;`; } const weekTotal=weekApps.length, monthTotal=monthApps.length; t+=`&lt;tr style="font-weight:700;background:#eef6ff"&gt;&lt;td style="padding:7px"&gt;Totaal&lt;/td&gt;&lt;td style="text-align:center"&gt;${weekTotal}&lt;/td&gt;&lt;td style="text-align:center"&gt;${monthTotal}&lt;/td&gt;&lt;/tr&gt;`; document.getElementById("deviceTotals").innerHTML=t; document.getElementById("printPeriod").textContent=`Week: ${fd(weekStart)} – ${fd(new Date(weekEnd.getTime()-86400000))} · Maand: ${monthStart.toLocaleDateString("nl-BE",{month:"long",year:"numeric"})}`; let d='&lt;tr&gt;&lt;th style="text-align:left;padding:6px;border-bottom:1px solid #ddd"&gt;Arts&lt;/th&gt;&lt;th style="padding:6px;border-bottom:1px solid #ddd"&gt;Week&lt;/th&gt;&lt;th style="padding:6px;border-bottom:1px solid #ddd"&gt;Maand&lt;/th&gt;&lt;/tr&gt;'; for(const doc of doctors){ d+=`&lt;tr&gt;&lt;td style="padding:6px;border-bottom:1px solid #eee"&gt;${doc}&lt;/td&gt;&lt;td style="text-align:center;border-bottom:1px solid #eee"&gt;${docCount(weekApps,doc)}&lt;/td&gt;&lt;td style="text-align:center;border-bottom:1px solid #eee"&gt;${docCount(monthApps,doc)}&lt;/td&gt;&lt;/tr&gt;`; } d+=`&lt;tr style="font-weight:700;background:#eef6ff"&gt;&lt;td style="padding:7px"&gt;Totaal&lt;/td&gt;&lt;td style="text-align:center"&gt;${weekTotal}&lt;/td&gt;&lt;td style="text-align:center"&gt;${monthTotal}&lt;/td&gt;&lt;/tr&gt;`; document.getElementById("doctorTotals").innerHTML=d; document.getElementById("doctorDeviceWeek").innerHTML=renderDoctorDeviceTable(weekStart,weekEnd); document.getElementById("doctorDeviceMonth").innerHTML=renderDoctorDeviceTable(monthStart,monthEnd); const analyzers=\["KD","GVT","AV","JE","LC","Papa Denef","Andere"\]; let an='&lt;tr&gt;&lt;th style="text-align:left;padding:7px;border-bottom:1px solid #ddd"&gt;Geanalyseerd door&lt;/th&gt;&lt;th style="padding:7px;border-bottom:1px solid #ddd"&gt;HO&lt;/th&gt;&lt;th style="padding:7px;border-bottom:1px solid #ddd"&gt;HN&lt;/th&gt;&lt;th style="padding:7px;border-bottom:1px solid #ddd"&gt;Totaal analyses&lt;/th&gt;&lt;/tr&gt;'; let totalHO=0,totalHN=0; for(const who of analyzers){ const ho=monthApps.filter(a=&gt;a.analyzedBy===who &amp;&amp; statCat(a)==="ONE").length; const hn=monthApps.filter(a=&gt;a.analyzedBy===who &amp;&amp; statCat(a)==="MULTI").length; if(ho+hn&gt;0){ an+=`&lt;tr&gt;&lt;td style="padding:7px;border-bottom:1px solid #eee;font-weight:700"&gt;${who}&lt;/td&gt;&lt;td style="text-align:center;border-bottom:1px solid #eee"&gt;${ho}&lt;/td&gt;&lt;td style="text-align:center;border-bottom:1px solid #eee"&gt;${hn}&lt;/td&gt;&lt;td style="text-align:center;border-bottom:1px solid #eee;font-weight:700"&gt;${ho+hn}&lt;/td&gt;&lt;/tr&gt;`; } totalHO+=ho;totalHN+=hn; } const open=monthApps.filter(a=&gt;a.device!=="BD" &amp;&amp; !a.analyzedBy).length; an+=`&lt;tr style="font-weight:700;background:#eef6ff"&gt;&lt;td style="padding:7px"&gt;Totaal geanalyseerd&lt;/td&gt;&lt;td style="text-align:center"&gt;${totalHO}&lt;/td&gt;&lt;td style="text-align:center"&gt;${totalHN}&lt;/td&gt;&lt;td style="text-align:center"&gt;${totalHO+totalHN}&lt;/td&gt;&lt;/tr&gt;`; an+=`&lt;tr&gt;&lt;td style="padding:7px"&gt;&lt;b&gt;Nog open&lt;/b&gt;&lt;/td&gt;&lt;td colspan="3" style="text-align:center"&gt;&lt;b&gt;${open}&lt;/b&gt;&lt;/td&gt;&lt;/tr&gt;`; document.getElementById("analysisMonth").innerHTML=an; } function saveAll(){localStorage.setItem(KEY,JSON.stringify(appointments))} document.getElementById("printTotals").onclick=()=&gt;{renderTotals();window.print()}; document.getElementById("toggleTotals").onclick=()=&gt;{ const p=document.getElementById("totalsPanel"); p.style.display=p.style.display==="none"?"block":"none"; document.getElementById("toggleTotals").textContent=p.style.display==="none"?"Toon totalen voor Koen":"Verberg totalen"; renderTotals() }; document.getElementById("prev").onclick=()=&gt;{currentMonday.setDate(currentMonday.getDate()-7);render()}; document.getElementById("next").onclick=()=&gt;{currentMonday.setDate(currentMonday.getDate()+7);render()}; document.getElementById("today").onclick=()=&gt;{currentMonday=getMonday(new Date());render()}; render(); &lt;/script&gt;&lt;/body&gt;&lt;/html&gt;

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