function ajaxUpdate(vs_url) {
    
   // document.getElementById(vs_obj).className="loading_on";

    var xmlObj = null;
    if(window.XMLHttpRequest){
        xmlObj = new XMLHttpRequest();
    } else if(window.ActiveXObject){
        xmlObj = new ActiveXObject("Microsoft.XMLHTTP");
    } else {
        return;
    }
    
    xmlObj.onreadystatechange = function(){
        if(xmlObj.readyState == 4){

            var o_obj = document.getElementById("content");
            o_obj.innerHTML = xmlObj.responseText;
           // o_obj.className = "loading_off";
           //swapHeadShotImage();
           //if ( vs_command != null ) eval( vs_command );
         
           ajaxHeight();
         
        }
    }
    
    xmlObj.open('GET', vs_url, true);
    xmlObj.send('');

    focus();

}