diff --git a/polyclinic_scheduling/apps/RUG_template/static/RUG_template/javascript/formdata.min.js b/polyclinic_scheduling/apps/RUG_template/static/RUG_template/javascript/formdata.min.js
new file mode 100644
index 0000000..a5fde02
--- /dev/null
+++ b/polyclinic_scheduling/apps/RUG_template/static/RUG_template/javascript/formdata.min.js
@@ -0,0 +1,18 @@
+;(function(){var k;function m(a){var b=0;return function(){return b<a.length?{done:!1,value:a[b++]}:{done:!0}}}var p="function"==typeof Object.defineProperties?Object.defineProperty:function(a,b,c){a!=Array.prototype&&a!=Object.prototype&&(a[b]=c.value)},q="undefined"!=typeof window&&window===this?this:"undefined"!=typeof global&&null!=global?global:this;function r(){r=function(){};q.Symbol||(q.Symbol=u)}function v(a,b){this.s=a;p(this,"description",{configurable:!0,writable:!0,value:b})}
+v.prototype.toString=function(){return this.s};var u=function(){function a(c){if(this instanceof a)throw new TypeError("Symbol is not a constructor");return new v("jscomp_symbol_"+(c||"")+"_"+b++,c)}var b=0;return a}();function w(){r();var a=q.Symbol.iterator;a||(a=q.Symbol.iterator=q.Symbol("Symbol.iterator"));"function"!=typeof Array.prototype[a]&&p(Array.prototype,a,{configurable:!0,writable:!0,value:function(){return x(m(this))}});w=function(){}}
+function x(a){w();a={next:a};a[q.Symbol.iterator]=function(){return this};return a}function y(a){var b="undefined"!=typeof Symbol&&Symbol.iterator&&a[Symbol.iterator];return b?b.call(a):{next:m(a)}}var z;if("function"==typeof Object.setPrototypeOf)z=Object.setPrototypeOf;else{var A;a:{var B={v:!0},C={};try{C.__proto__=B;A=C.v;break a}catch(a){}A=!1}z=A?function(a,b){a.__proto__=b;if(a.__proto__!==b)throw new TypeError(a+" is not extensible");return a}:null}var D=z;
+function E(){this.h=!1;this.c=null;this.o=void 0;this.b=1;this.m=this.w=0;this.g=null}function F(a){if(a.h)throw new TypeError("Generator is already running");a.h=!0}E.prototype.i=function(a){this.o=a};E.prototype.j=function(a){this.g={A:a,B:!0};this.b=this.w||this.m};E.prototype["return"]=function(a){this.g={"return":a};this.b=this.m};function G(a,b,c){a.b=c;return{value:b}}function H(a){this.C=a;this.l=[];for(var b in a)this.l.push(b);this.l.reverse()}function I(a){this.a=new E;this.D=a}
+I.prototype.i=function(a){F(this.a);if(this.a.c)return J(this,this.a.c.next,a,this.a.i);this.a.i(a);return K(this)};function L(a,b){F(a.a);var c=a.a.c;if(c)return J(a,"return"in c?c["return"]:function(d){return{value:d,done:!0}},b,a.a["return"]);a.a["return"](b);return K(a)}I.prototype.j=function(a){F(this.a);if(this.a.c)return J(this,this.a.c["throw"],a,this.a.i);this.a.j(a);return K(this)};
+function J(a,b,c,d){try{var e=b.call(a.a.c,c);if(!(e instanceof Object))throw new TypeError("Iterator result "+e+" is not an object");if(!e.done)return a.a.h=!1,e;var f=e.value}catch(g){return a.a.c=null,a.a.j(g),K(a)}a.a.c=null;d.call(a.a,f);return K(a)}function K(a){for(;a.a.b;)try{var b=a.D(a.a);if(b)return a.a.h=!1,{value:b.value,done:!1}}catch(c){a.a.o=void 0,a.a.j(c)}a.a.h=!1;if(a.a.g){b=a.a.g;a.a.g=null;if(b.B)throw b.A;return{value:b["return"],done:!0}}return{value:void 0,done:!0}}
+function M(a){this.next=function(b){return a.i(b)};this["throw"]=function(b){return a.j(b)};this["return"]=function(b){return L(a,b)};w();this[Symbol.iterator]=function(){return this}}function N(a,b){var c=new M(new I(b));D&&D(c,a.prototype);return c}
+if("undefined"!==typeof Blob&&("undefined"===typeof FormData||!FormData.prototype.keys)){var O=function(a,b){for(var c=0;c<a.length;c++)b(a[c])},P=function(a,b,c){return b instanceof Blob?[String(a),b,void 0!==c?c+"":"string"===typeof b.name?b.name:"blob"]:[String(a),String(b)]},Q=function(a,b){if(a.length<b)throw new TypeError(b+" argument required, but only "+a.length+" present.");},S=function(a){var b=y(a);a=b.next().value;b=b.next().value;a instanceof Blob&&(a=new File([a],b,{type:a.type,lastModified:a.lastModified}));
+return a},T="object"===typeof window?window:"object"===typeof self?self:this,U=T.FormData,V=T.XMLHttpRequest&&T.XMLHttpRequest.prototype.send,W=T.Request&&T.fetch,X=T.navigator&&T.navigator.sendBeacon;r();var Y=T.Symbol&&Symbol.toStringTag;Y&&(Blob.prototype[Y]||(Blob.prototype[Y]="Blob"),"File"in T&&!File.prototype[Y]&&(File.prototype[Y]="File"));try{new File([],"")}catch(a){T.File=function(b,c,d){b=new Blob(b,d);d=d&&void 0!==d.lastModified?new Date(d.lastModified):new Date;Object.defineProperties(b,
+{name:{value:c},lastModifiedDate:{value:d},lastModified:{value:+d},toString:{value:function(){return"[object File]"}}});Y&&Object.defineProperty(b,Y,{value:"File"});return b}}r();w();var Z=function(a){this.f=Object.create(null);if(!a)return this;var b=this;O(a.elements,function(c){if(c.name&&!c.disabled&&"submit"!==c.type&&"button"!==c.type)if("file"===c.type){var d=c.files&&c.files.length?c.files:[new File([],"",{type:"application/octet-stream"})];O(d,function(e){b.append(c.name,e)})}else"select-multiple"===
+c.type||"select-one"===c.type?O(c.options,function(e){!e.disabled&&e.selected&&b.append(c.name,e.value)}):"checkbox"===c.type||"radio"===c.type?c.checked&&b.append(c.name,c.value):(d="textarea"===c.type?c.value.replace(/\r\n/g,"\n").replace(/\n/g,"\r\n"):c.value,b.append(c.name,d))})};k=Z.prototype;k.append=function(a,b,c){Q(arguments,2);var d=y(P.apply(null,arguments));a=d.next().value;b=d.next().value;c=d.next().value;d=this.f;d[a]||(d[a]=[]);d[a].push([b,c])};k["delete"]=function(a){Q(arguments,
+1);delete this.f[String(a)]};k.entries=function b(){var c=this,d,e,f,g,h,t;return N(b,function(l){switch(l.b){case 1:d=c.f,f=new H(d);case 2:var n;a:{for(n=f;0<n.l.length;){var R=n.l.pop();if(R in n.C){n=R;break a}}n=null}if(null==(e=n)){l.b=0;break}g=y(d[e]);h=g.next();case 5:if(h.done){l.b=2;break}t=h.value;return G(l,[e,S(t)],6);case 6:h=g.next(),l.b=5}})};k.forEach=function(b,c){Q(arguments,1);for(var d=y(this),e=d.next();!e.done;e=d.next()){var f=y(e.value);e=f.next().value;f=f.next().value;
+b.call(c,f,e,this)}};k.get=function(b){Q(arguments,1);var c=this.f;b=String(b);return c[b]?S(c[b][0]):null};k.getAll=function(b){Q(arguments,1);return(this.f[String(b)]||[]).map(S)};k.has=function(b){Q(arguments,1);return String(b)in this.f};k.keys=function c(){var d=this,e,f,g,h,t;return N(c,function(l){1==l.b&&(e=y(d),f=e.next());if(3!=l.b){if(f.done){l.b=0;return}g=f.value;h=y(g);t=h.next().value;return G(l,t,3)}f=e.next();l.b=2})};k.set=function(c,d,e){Q(arguments,2);var f=P.apply(null,arguments);
+this.f[f[0]]=[[f[1],f[2]]]};k.values=function d(){var e=this,f,g,h,t,l;return N(d,function(n){1==n.b&&(f=y(e),g=f.next());if(3!=n.b){if(g.done){n.b=0;return}h=g.value;t=y(h);t.next();l=t.next().value;return G(n,l,3)}g=f.next();n.b=2})};Z.prototype._asNative=function(){for(var d=new U,e=y(this),f=e.next();!f.done;f=e.next()){var g=y(f.value);f=g.next().value;g=g.next().value;d.append(f,g)}return d};Z.prototype._blob=function(){for(var d="----formdata-polyfill-"+Math.random(),e=[],f=y(this),g=f.next();!g.done;g=
+f.next()){var h=y(g.value);g=h.next().value;h=h.next().value;e.push("--"+d+"\r\n");h instanceof Blob?e.push('Content-Disposition: form-data; name="'+g+'"; filename="'+h.name+'"\r\n',"Content-Type: "+(h.type||"application/octet-stream")+"\r\n\r\n",h,"\r\n"):e.push('Content-Disposition: form-data; name="'+g+'"\r\n\r\n'+h+"\r\n")}e.push("--"+d+"--");return new Blob(e,{type:"multipart/form-data; boundary="+d})};Z.prototype[Symbol.iterator]=function(){return this.entries()};Z.prototype.toString=function(){return"[object FormData]"};
+Y&&(Z.prototype[Y]="FormData");if(V){var aa=T.XMLHttpRequest.prototype.setRequestHeader;T.XMLHttpRequest.prototype.setRequestHeader=function(d,e){aa.call(this,d,e);"content-type"===d.toLowerCase()&&(this.u=!0)};T.XMLHttpRequest.prototype.send=function(d){d instanceof Z?(d=d._blob(),this.u||this.setRequestHeader("Content-Type",d.type),V.call(this,d)):V.call(this,d)}}if(W){var ba=T.fetch;T.fetch=function(d,e){e&&e.body&&e.body instanceof Z&&(e.body=e.body._blob());return ba.call(this,d,e)}}X&&(T.navigator.sendBeacon=
+function(d,e){e instanceof Z&&(e=e._asNative());return X.call(this,d,e)});T.FormData=Z};
+})();
diff --git a/polyclinic_scheduling/apps/RUG_template/templates/base.html b/polyclinic_scheduling/apps/RUG_template/templates/base.html
index b867a67..01f255b 100644
--- a/polyclinic_scheduling/apps/RUG_template/templates/base.html
+++ b/polyclinic_scheduling/apps/RUG_template/templates/base.html
@@ -48,6 +48,7 @@
     <link href="{% static 'RUG_template/css/base.css' %}" rel="stylesheet"/>
     <script type="text/javascript" src="{% static 'RUG_template/javascript/moment-with-locales.min.js' %}"></script>
     <script type="text/javascript" src="{% static 'RUG_template/javascript/humanize-duration.js' %}"></script>
+    <script type="text/javascript" src="{% static 'RUG_template/javascript/formdata.min.js' %}"></script>
 
   </head>
   <body itemtype="http://schema.org/WebPage" itemscope="itemscope" id="top" class="page--topicpage"><!--googleoff: all-->
diff --git a/polyclinic_scheduling/apps/schedule/templates/schedule/schedule_new.html b/polyclinic_scheduling/apps/schedule/templates/schedule/schedule_new.html
index dfa42c3..6e77b8c 100644
--- a/polyclinic_scheduling/apps/schedule/templates/schedule/schedule_new.html
+++ b/polyclinic_scheduling/apps/schedule/templates/schedule/schedule_new.html
@@ -1073,7 +1073,16 @@
               formdata.delete('csrfmiddlewaretoken');
               formdata.delete('json');
 
-              jQuery('input#id_json').val(JSON.stringify(Object.fromEntries(formdata)));
+              // Display the key/value pairs. This is needed to support stupid IE. Mici$oft is still having hardtime playing nice :(
+              let json_data = {};
+              var formDataEntries = formdata.entries(), formDataEntry = formDataEntries.next(), pair;
+              while (!formDataEntry.done) {
+                  pair = formDataEntry.value;
+                  json_data[pair[0]] = pair[1];
+                  formDataEntry = formDataEntries.next();
+              }
+
+              jQuery('input#id_json').val(JSON.stringify(json_data));
               return true;
           } else {
             alert('Er zijn wat problemen met het formulier. Controleer de invoer velden');