Loading in the wrong div

[ejaboneta]

My site uses this as a generic code to load pages into a div. Sometimes when the page loads 2 or more, they get mixed up and load in the wrong div. How can I prevent this?

 

  var xmlHttp 
  function ajaxScript(responsediv) {
      try {
        // Firefox, Opera 8.0+, Safari
        xmlHttp=new XMLHttpRequest();
      }
      catch (e) {
        // Internet Explorer
        try {
          xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
        }
        catch (e) {
          try {
            xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
          }
          catch (e) {
            alert("Your browser does not support AJAX!");
            return false;
          }
        }
      }
      xmlHttp.onreadystatechange=function(response)
        {
        if(xmlHttp.readyState==4)
          {
          parent.document.getElementById(responsediv).innerHTML=xmlHttp.responseText;
          }
        }        
   }
   
   
  // Call into div
  function callToDiv(responsediv, url) {

     ajaxScript(responsediv);
     xmlHttp.open("GET",url,true);
     xmlHttp.send(null);
     xmlHttp 
  }