function AJAXload(url, divID){
     var req;
     
        if(window.XMLHttpRequest){
            req= new XMLHttpRequest();
        } 
        else if(window.ActiveXObject) {
            req= new ActiveXObject("Microsoft.XMLHTTP");
        }
        
        req.open("POST", url, true);
        req.onreadystatechange = function callback() {
            if(req.readyState == 4) {
                if(req.status == 200) {
                    document.getElementById(divID).style.display = 'block';
                    document.getElementById(divID).innerHTML = "";
                    document.getElementById(divID).innerHTML = req.responseText;
                }
            } 
            else if(req.readyState == 3){
                if(document.getElementById(divID).innerHTML != "<center><img src='./images/loading.gif'></center>"){
                    document.getElementById(divID).innerHTML = "<center><img src='./images/loading.gif'></center>";
                }
            }
        }
        
        req.send(url);
        //return false;
        
        document.getElementById('ctl00_ContentPlaceHolder1_tabs').style.display = 'none';
    }
    
    function Back(toShow, toHide){
        document.getElementById(toShow).style.display = 'block';
        document.getElementById(toHide).style.display = 'none';
    }