/* Edited version of: 
   http://jibbering.com/2002/4/httprequest.html 
   to serve IE7 with XMLHttpRequest instead of ActiveX */ 

var xmlhttp=false; 
if (!xmlhttp && typeof XMLHttpRequest!='undefined') { 
        try { 
                 xmlhttp = new XMLHttpRequest(); 
        } catch (e) { 
                 xmlhttp=false;
        } 
} 

/*@cc_on @*/ 
/*@if (@_jscript_version >= 5) 
// JScript gives us Conditional compilation, we can cope with old IE versions. 
// and security blocked creation of the objects. 
if (!xmlhttp){ 
 try { 
  xmlhttp = new ActiveXObject("Msxml2.XMLHTTP"); 
 } catch (e) { 
  try { 
   xmlhttp = new ActiveXObject("Microsoft.XMLHTTP"); 
  } catch (E) { 
   xmlhttp = false; 
  } 
 } 
} 
@end @*/ 

if (!xmlhttp && window.createRequest) { 
        try { 
                xmlhttp = window.createRequest(); 
        } catch (e) { 
                xmlhttp=false; 
        } 
} 

/* Edited version of: 
   http://javascript.internet.com/ajax/ajax-navigation.html */ 

var please_wait = "Please wait..."; 

function open_url(url, targetId) { 
  if(!xmlhttp)return false; 
    var e=document.getElementById(targetId);if(!e)return false; 
    if(please_wait)e.innerHTML = please_wait; 
    xmlhttp.open("GET", url, true); 
    xmlhttp.onreadystatechange = function() { response(url, e); } 
    try{ 
      xmlhttp.send(null); 
    }catch(l){ 
    while(e.firstChild)e.removeChild(e.firstChild);//e.innerHTML="" the standard way 
    e.appendChild(document.createTextNode("request failed")); 
  } 
} 

function response(url, e) {
  if(xmlhttp.readyState != 4)return; 
    var tmp= (xmlhttp.status == 200 || xmlhttp.status == 0) ? xmlhttp.responseText : "Error - broken link! Please contact the webmaster, giving the following error code: " + xmlhttp.status+" "+xmlhttp.statusText;

    var d=document.createElement("div"); 
    d.innerHTML=tmp; 
    setTimeout(function(){ 
      while(e.firstChild)e.removeChild(e.firstChild);//e.innerHTML="" the standard way 
      e.appendChild(d); 
    },10) 
}