cuPop = null
function cu(link,wd,ht){
	if (cuPop == null ||  cuPop.closed)
	{ 
	//POP UP NOG NIET OPEN OF REEDS BESTAAND en weer GESLOTEN
	LeftPosition = ((screen.width)-wd-30);
        TopPosition = (((screen.height/2)-(ht/2))-30);
        cuPop = window.open(link,"commingup",'width=' + wd + ',height=' + ht +',top='+TopPosition+',left='+LeftPosition+',toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no,copyhistory=no');                
             	if (document.all) 
	        {
		cuPop.resizeTo(wd+10,ht+30);
		cuPop.focus();
		return;
		} else if (document.layers || document.getElementById) 
		{
		cuPop.innerHeight = ht;
		cuPop.innerWidth = wd;
		cuPop.focus();
		return;
		}
       	cuPop.focus();
       	return;
     	}else
        {
     	//POP UP REEDS BESTAAND
        cuPop.focus();
        return;
   	}
} //end cu sitepop