asp.netでは、jsの戻り値をasp.netコントロールに付与する小さな例を示します.

 
  
     
  <br>    var second=0; 
  <br>    var minute=0; 
  <br>    var hour=0; 
  <br>    window .setInterval ("OnlineStayTimes();",1000); 
  <br>    function OnlineStayTimes() 
  <br>    { 
  <br>    second ++; 
  <br>    if(second ==60){second =0;minute +=1;} 
  <br>    if(minute ==60){minute =0;hour +=1;} 
  <br>    var tm=hour+"  "+minute +"  "+second +" " 
  <br>    document.getElementById ("time").innerHTML=tm; 
  <br>    } 
  <br>