function GetXmlHttpObject(handler)
  { 
      var objXmlHttp=null;
      if (navigator.userAgent.indexOf("Opera")>=0)
      {
          alert("This example doesn't work in Opera"); 
          return ;
      }
      if (navigator.userAgent.indexOf("MSIE")>=0)
      { 
          var strName="Msxml2.XMLHTTP";
              if (navigator.appVersion.indexOf("MSIE 5.5")>=0)
              {
              strName="Microsoft.XMLHTTP";
              } 
              try
              { 
                  objXmlHttp=new ActiveXObject(strName);
                  objXmlHttp.onreadystatechange=handler ;
                  return objXmlHttp;
              } 
              catch(e)
              { 
              alert("Error. Scripting for ActiveX might be disabled"); 
              return ;
              } 
      } 
      if (navigator.userAgent.indexOf("Mozilla")>=0)
      {
          objXmlHttp=new XMLHttpRequest();
          objXmlHttp.onload=handler;
          objXmlHttp.onerror=handler ;
          return objXmlHttp;
      }
  } 
function GetResults(args)
{ 
    var objmain = document.getElementById('divMain');
    if(objmain!=null)
    {
        ToggleProgressBar('');
        objmain.style.display='none';
    }
    var url="Tempmediumtruck_landing.aspx?args=" + args;
    xmlHttp=GetXmlHttpObject(stateChanged);
    xmlHttp.open("GET", url , true);
    xmlHttp.send(null);
} 


function stateChanged() 
{ 
    if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
    {
    ReceiveServerData(xmlHttp.responseText);
    }
}