function windowOpen(url,target,width,height){
	width  = (width)  ? width  : 640;
	height = (height) ? height : 480;
	target = (target) ? target : '_blank';
	var wo = window.open(url,target,'scrollbars=1,resizable=1,toolbar=1,location=1,status=1,menubar=1,width='+width+',height='+height);
	wo.focus();
}