function popup(website,id)
{
	var Hoogte = screen.Height;
	var Breedte = screen.Width;
	var x = Math.floor((Breedte - 640)/2);
	var y = Math.floor((Hoogte - 480)/2);
	var website = website + "?idc=" + id;
 
	var mailpopup = window.open (website,"","location=0,menubar=0,resizable=0,status=0,toolbar=0,width=640,height=480");
	mailpopup.moveTo(x, y);
}