function platformDetect()
{
  if(navigator.appVersion.indexOf("Win") != -1)
  {
    alert("Windows");
  }
  else if(navigator.appVersion.indexOf("Mac") != -1)
  {
    alert("Macintosh");
  }
  else alert("Other");
}
function popUp(URL, name, x, y) {
  msgWindow = window.open(URL, name, "toolbar=0,scrollbars=1,location=0,statusbar=0,menubar=0,resizable=1,width=" + x + ",height=" + y);
  <!-- msgWindow.focus(); -->
  <!-- return msgWindow; -->
}

function closePopUp() {
	try {
		if(w && !w.closed) {
			w.close();
		}
	}
	catch(e){
		// Do Nothing!!
	}
	finally {
		window.location = "nav.asp?ref=yes";
	}
}