function downloadTrack(downloadName) 
{
  
  var url = "/php/hs.downloadTrack.php/?downloadName=" + escape(downloadName);

  new Ajax.Request(url,{asynchronous:true, onSuccess:handlerFunc_2, onFailure:errFunc_2});
  
  //new Ajax.Request('/php/<?=$filePrefix?>.vehicleSearch.php', {asynchronous:true});
  /*
  http.open("GET", url, true); 
  http.onreadystatechange = handleHttpResponse; 
  http.send(null);
  */
}
/*
var handlerFunc = function(t) {
//    alert(t.responseText);
}
*/
var errFunc_2 = function(t) {
//    alert('Error ' + t.status + ' -- ' + t.statusText);
}

//For an XML response:
var handlerFunc_2 = function(t)
{
//alert(t.responseText);
 if (t.readyState == 4)
 { // Split the comma delimited response into an array

 } //end if readystate
}