function PopUp(url){
  var wdt = 500;
  var hgt = 200;
  LeftPosition = (((screen.width)/2)-(wdt/2))-15;
  TopPosition = (((screen.height)/2)-(hgt/2))+15;
   var opt = "toolbar=no,top=" + TopPosition + ",left=" + LeftPosition + ",scrollbars=yes, resizable=yes , height=" + hgt + " ,width=" + wdt;
   var popup = window.open(url, "pop", opt);
   popup.focus();
}