var AntiPopUpEnabled = false;

function isPopUpActive()
{
 try
 {
 var novajan = window.open('about:blank','','left=-100,top=-100,height=10,width=10');

  if (!novajan.cloded) 
  {
   novajan.close();
   return false;
  }
 }
 catch(E) 
 {
 
 }
 
 return true
}

AntiPopUpEnabled = isPopUpActive();