var ObjVar = null; 
function popupWindow(strUrl)
{
	
	if(ObjVar == null || ObjVar.closed)
	{
		ObjVar = window.open(strUrl,"_blank", "top=0, left=0, location=1, toolbar=1, menubar=1, resizable=1, scrollbars=1, status=1, width=785, height=570");
	}

	else
	{
		ObjVar.focus();	
	}
}