asp.net a small example of assigning the return value of js to the asp.net control

    <script language ="javascript" type ="text/javascript">
    var second=0;
    var minute=0;
    var hour=0;
    window .setInterval ("OnlineStayTimes();",1000);
    function OnlineStayTimes()
    {
    second ++;
    if(second ==60){second =0;minute +=1;}
    if(minute ==60){minute =0;hour +=1;}
    var tm=hour+" hours "+minute +" minutes "+second +" seconds "
    document.getElementById ("time").innerHTML=tm;
    }
    </script>

document.getElementById ("time").innerHTML =tm; "time" in label is id of label, so you can display the online time!