// JScript File
document.write('<div style="background-color:white;position:absolute; left:50%; top:50%" id="loading">bezig met laden <img src="images/ladenData.gif"/></div>');

 
function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      if (oldonload) {
        oldonload();
      }
      func();
    }
  }
}
addLoadEvent(function() {
  document.getElementById("loading").style.display="none";
});