var PositionX = 110;
var PositionY = 50;

var Popup;

function Zoom(url,title,Hsize,Vsize) {
	options="\"scrollbars=yes,menubar=no,status=no,width=" + Hsize + ",height=" + Vsize + ",left=" + PositionX + ",top=" + PositionY +"\"";

	if (Popup && !Popup.closed) {
		Popup.location.href=url;
		}
	else {
		Popup=window.open(url,title,options);
        //alert(url);
		}
	Popup.focus();
  }