var MonitorWidth = screen.width;
var MonitorHeight = screen.height;

function pop(URL, wide, high) {
//		 var wide = "550";
//		 var high = "412";
  		 var locx = (MonitorWidth-wide)/2, locy = (MonitorHeight-high)/2;
		 var approvers = window.open(URL,'upload','width='+wide+',height='+high+', screenx='+locx+', screeny='+locy+', top='+locy+', left='+locx+', scrollbars=no, menubar=no, status=no');
}