function XMLHttpObj() {
     var xmlhttp;
      /*@cc_on
      @if (@_jscript_version >= 5)
        try {
          xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
        } catch (e) {
          try {
            xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
          } catch (E) {
            xmlhttp = false;
          }
        }
      @else
      xmlhttp = false;
      @end @*/
      if (!xmlhttp && typeof XMLHttpRequest != 'undefined') {
        try {
          xmlhttp = new XMLHttpRequest();
        } catch (e) {
          xmlhttp = false;
        }
      }
      return xmlhttp;
    }

    function DoBrowserUnload(){
        if(window.screenTop > 10000){
         var http = XMLHttpObj();
          http.open("POST", "/home/BrowserClose.asp", true);   //synchronus call
         http.send(null);
        }
    }