<!--CENTREREN-->
window.onresize = ReloadPage;
function ReloadPage(){  
                         window.location.href = window.location.href }
function positioning() {
                     var height, width, left, top;
if (document.all) //alleen voor IE
    height = document.body.offsetHeight, width = document.body.offsetWidth;
else //DOM compatible browsers
    height = window.innerHeight, width = window.innerWidth;
left = (width-780)/2;
if (left<0) left=40;
top = ((height-600)/2)-26;
if (top<0) top=20;

  var  a ;
  a = document.getElementById("centreren");
        a.style.left= (left-20);
        a.style.top= top;
	  	a.style.visibility= "visible"; 
		}
		
if (self != top) {
top.location.href = self.location.href;
}