var blockerDetected;
function detectPopupBlocker(URL) {
  var myTest = window.open(URL,"","directories=no,height=100,width=100,menubar=no,resizable=no,scrollbars=no,status=no,titlebar=no,top=0,location=no");
  if (!myTest) {
    blockerDetected = false;
  } else {
    myTest.close();
    blockerDetected=true;
  }
}

//detectPopupBlocker("http://bhc-webct.bhc.edu");