function change_style()
    {
    try{
    css=document.styleSheets[0].href;
    obj=document.getElementsByTagName('link')[0];
    }
    catch(er){}
    re=/style\.css/;    
    if(re.test(css))
        {
        obj.href='css/style2.css';
        document.body.innerHTML=document.body.innerHTML;
        }
    else
        {
        obj.href='css/style.css';
        document.body.innerHTML=document.body.innerHTML;
        }
    
    if (window.XMLHttpRequest)
        {
        req = new XMLHttpRequest();
        req.onreadystatechange = processReqChange;
        req.open("GET", true);
        req.send(null);
        }
    else if (window.ActiveXObject)
        {
        req = new ActiveXObject("Microsoft.XMLHTTP");
        if (req)
            {
            req.onreadystatechange = processReqChange;
            req.open("GET", true);
            req.send();
            }
        } ;
    }
function processReqChange()
     {
     if (req.readyState == 4)
         {
         if (req.status != 200)
             {
             
             }
         }
     }