EBCS fixed 2nd header

css.css

.headingtable {
      top: 80px !important;
      background-color: #c0c0c0 !important; //dit omdat het black theme de header overschrijft
}

inline_javascript.js

var childeren = $('table#dataScherm_grd tbody tr.myheader')[0].cells;
$('table#dataScherm_grd tbody tr.myheader').remove();
let thead = '<thead class="myheader">';
for(var c of childeren){
  thead+= "<td "+ ((c.className)?"class=\""+c.className+"\"":"")+">"+c.innerText+"</td>";
}
thead += "</thead>";
$('table#dataScherm_grd').prepend(thead);
$("table#dataScherm_grd thead.myheader").addClass("scrollfixed");
$("table#dataScherm_grd thead.myheader").addClass("headingtable");