function OpenPopUp(url, wi, hi)
{
    var WID;
	var HID;
	WID=window.screen.width;
	HID=window.screen.height;
	var wpos=(WID-wi)/2;
	var hpos=(HID-hi)/2;
	window.open(url,'PopUpImage','scrollbars=no,resizable=yes,width='+wi+',height='+hi+',left='+wpos+',top='+hpos);
}