var req;
var which;
 
function retrieveURL(url, idElement) 
{
	which=idElement;
	if (window.XMLHttpRequest) // Non-IE browsers
	{ 	
      req = new XMLHttpRequest();
      
      req.onreadystatechange = processStateChange;
      try 
      {
        req.open("GET", url, true);
      } 
      catch (e) 
      {	
        alert(e);
      }
  	  req.send(null);
    } 
    else if (window.ActiveXObject) // IE
    {
      req = new ActiveXObject("Microsoft.XMLHTTP");
      if (req) 
      {
        req.onreadystatechange = processStateChange;
        req.open("GET", url, true);
        req.send();

      }
	}
}
    
function processStateChange() 
{
	if (req.readyState == 4) // Complete
	{ 
		if (req.status == 200)  // OK response
	    {
	    	which.innerHTML = req.responseText;
	    } 
	    else 
	    {
	        alert("Problem: " + req.statusText);
	    }
	}
}