function popup(url, width, height)
{
if(url!=undefined && width!=undefined && height!=undefined){
	re = new RegExp("[^a-z0-9]+", "gim");
	
	windowId = url.replace(re, '');
	//alert(windowId);
	window.open(url, windowId, 'left=20,top=20,width='+width+',height='+height+',status=no,toolbar=no,menubar=no,location=no');
	}
}