function refreshcode(obj) 
{
    var dt = new Date();
    if(obj.src.indexOf("r=")>0)
    {
        obj.src = obj.src.replace(/r\=\d+/, "r=" + dt.getMinutes() + dt.getSeconds().toString());
    }
    else
    {
        obj.src = obj.src + "&r=" +  dt.getSeconds().toString();   
    }
}