function popup_open(url,name,wx,wy,toolbar,location,statusbar,menubar,scrollbars,resizable){
	x = (screen.width  - wx) / 2;
	y = (screen.height - wy) / 2 - 20;
	window.open(url,name,'width='+wx+',height='+wy+',toolbar='+toolbar+',location='+location+',status='+status+',menubar='+menubar+',scrollbars='+scrollbars+',resizable='+resizable+',left='+x+',top='+y+'');
}