sid = '';
    function show(id){
        if(sid != ''){
            document.getElementById(sid).style.display = "none";
        }
        document.getElementById(id).style.display = "block";
        sid = id;
        t = setTimeout("hideall()", 5000);
    }
   
    function smarthider(){
        t = setTimeout("hideall()", 2000);
    }
   
    function hideall(){
        if(sid != ''){
            document.getElementById(sid).style.display = "none";
            sid = '';
        }
    }