function popUp(URL,width,height) {
	day = new Date();
	id = day.getTime();	
	window.open(URL,id,'toolbar=0,scrollbars=1,location=0,statusbar=0,menubar=0,resizable=1,width='+width
	+',height='+height+',left='+((screen.width-width)/2)+',top='+((screen.height-height)/2));
}