function get_truck_details(truck_url){
	callAjax_core(truck_url)
	origHTML='<div class="close"><a href="javascript:hide_overlay()"><img src="js_files/delete.gif" title="Close window" alt="close" height="16" width="16"></a></div>';
	show_overlay()
	}


function repl(img)
   {
   document.catalog_item_image.src=img;
   }



function getXMLHTTPRequest() 

{
var req = false;
try 
  {
   req = new XMLHttpRequest(); /* e.g. Firefox */
  } 
catch(err1) 
  {
  try 
    {
     req = new ActiveXObject("Msxml2.XMLHTTP");  /* some versions IE */
    } 
  catch(err2) 
    {
    try 
      {
       req = new ActiveXObject("Microsoft.XMLHTTP");  /* some versions IE */
      } 
      catch(err3) 
        {
         req = false;
        } 
    } 
  }
return req;
}




var AjaxRequest_core = getXMLHTTPRequest();
var element='overlay_content';




function callAjax_core(url) {
//**example**//
//var url = "ajax.return_xml.php?ajax_call=true&field_type="+field_type+"&search_phrase="+search_phrase;
//callAjax_core (url);

// build the URL of the server script we wish to call
// generate a random number
var myRandom=parseInt(Math.random()*99999999);
// ask our XMLHTTPRequest object to open a server connection
AjaxRequest_core. open("GET", url + "&rand=" + myRandom, true);
// prepare a function responseAjax() to run when the response has arrived
AjaxRequest_core.onreadystatechange = responseAjax_core;
// and finally send the request
AjaxRequest_core.send(null);
}

function responseAjax_core(){
	if (AjaxRequest_core.readyState == 4) {
    	window.newHtml = AjaxRequest_core.responseText;
		//alert(window.newHtml);
		//print html content in popup area
		document.getElementById(element).innerHTML = origHTML+window.newHtml;
	}else{//show loading wheel
	loader = '<div class="loader"><img src="js_files/loading_spinner.gif" width="16" height="16" alt="loading"></div>'
		document.getElementById(element).innerHTML=loader;
		}
	}
	
	
	
	
function hide_overlay(){
layer = document.getElementById('overlay');
layer.style.display='none';
layer2 = document.getElementById('overlay_content');
document.getElementById('overlay_content').innerHTML="";
layer2.style.display='none';
}



function show_overlay(){
layer = document.getElementById('overlay');
layer.style.display='block';
layer2 = document.getElementById('overlay_content');
layer2.style.display='block';
}