Tussen de <head> tags zet je:
[code]
<script language="javascript" type="text/javascript" src="http://pad/naar/common.js"></script>

		<script type="text/javascript">
<!--

function _body_onload()
{
	loff();
}

function _body_onunload()
{
	lon();
	
}
//-->
		</script>[/code]

Verander je body tag naar:
[code]
<body onLoad="_body_onload();" onUnload="_body_onunload();" id="mainCP">
[/code]
Dan het laad gedeelte (moet bovenaan de pagina komen direct na de body tag:
[code]
	<table border="0" cellspacing="0" cellpadding="0" id="loaderContainer" onClick="return false;">
  <tr>
  <td id="loaderContainerWH">
  <div id="loader">
  <table border="0" cellpadding="0" cellspacing="0" width="100%">
  <tr>
  <td>
  <p>
  <strong>
  <img alt="laden" src=Site_bestanden/laden.gif />
  bezig met laden...
  </strong>
  </p>
  </td>
  </tr>
  </table>
  </div>
  </td>
  </tr>
  </table>
	<div class="screenBody" id="screenClient">
	De inhoud van je pagina
	</div>[/code]

Verander je <a href tags naar:
<a onclick="lon();go_to(); return false;" href=

[code]
=============common.js==========



//---------------------------------- Loading



function lsetup_handler(e)
{
	lsetup(this);
	return true;
}

function lsetup(target)
{
	try {
		if (!target)
			target = this;

		var o_set = target.document.getElementById('loaderContainerWH');
		var o_getH = target.document.getElementsByTagName('BODY')[0];

		o_set.style.height = o_getH.scrollHeight;
	} catch (e) {
	}
}

function lon(target)
{
	try {
		if (parent.visibilityToolbar)
			parent.visibilityToolbar.set_display("standbyDisplayNoControls");
	} catch (e) {}

	try {
		if (!target)
			target = this;

		lsetup(target);

		if (!target._lon_disabled_arr)
			target._lon_disabled_arr = new Array();
		else if (target._lon_disabled_arr.length > 0)
			return true;

		target.document.getElementById("loaderContainer").style.display = "";
		var select_arr = target.document.getElementsByTagName("select");

		for (var i = 0; i < select_arr.length; i++) {
			if (select_arr[i].disabled)
				continue;

			select_arr[i].disabled = true;
			_lon_disabled_arr.pop(select_arr[i]);
			var clone = target.document.createElement("input");
			clone.type = "hidden";
			clone.name = select_arr[i].name;
			var values = new Array();
			for (var n = 0; n < select_arr[i].length; n++) {
				if (select_arr[i][n].selected) {
					values[values.length] = select_arr[i][n].value;
				}
			}
			clone.value = values.join(",");
			select_arr[i].parentNode.insertBefore(clone, select_arr[i]);
		}
	} catch (e) {
		return false;
	}
	return true;
}

function loff(target)
{
	try {
		if (parent.visibilityToolbar) {
			parent.visibilityToolbar.set_display(visibilityCount
												 ? "standbyDisplay"
												 : "standbyDisplayNoControls");
		}
	} catch (e) {}

	try {
		if (!target)
			target = this;

		target.document.getElementById("loaderContainer").style.display = "none";

		if (target._lon_disabled_arr) {
			while(_lon_disabled_arr.legth > 0) {
				var select = _lon_disabled_arr.push();
				select.disabled = false;

				var clones_arr = target.document.getElementsByName(select.name);
				for (var n = 0; n < clones_arr.length; n++) {
					if ("hidden" == clones_arr[n].type)
						clones_arr[n].parent.removeChild(clones_arr[n]);
				}
			}
		}
	} catch (e) {
		return false;
	}
	return true;
}



MM_reloadPage(true);[/code]

======css aanpassing=======

[code]/* --- loader ---*/

#loader {
  width: 320px;
  margin-left: auto;
  margin-right: auto;
}

#loader td {
  padding: 3px;
  background: #ffffff;
}

#loader p {
  border:   5px solid #87CEEB;
  padding: 10px;
  margin: 0; 
  font-family:   arial, helvetica;
  font-size:   20px;
  letter-spacing:   -1px;
  border:   5px solid #87CEEB;
  color:   #87CEEB;
  left:   37%;
  top:   35%;
}



#loader strong {
  display: block;
  margin-bottom: 3px;
}

#loaderContainer {
  position: fixed;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  position: expression('absolute');
  height: expression(document.documentElement.scrollHeight+'px');
  width: expression(document.documentElement.scrollWidth+'px');
  z-index: 1000;
}

#loaderContainer td {
	padding-top: 150px;
	vertical-align: top;
	text-align: center;
	background-image: url(http://www.bartvanasselt.nl/Site_bestanden/semi-transparent.gif;
}

#loaderContainer td td {
	padding-top: 3px;
	text-align: center;

}[/code]