Question

We have started a timer with the following code. Is it possible to make window.setInterval method fail, if another timer is active on the method passed to the window.setInterval method?

GInterValId = window.setInterval("AutoRefresh()",parseInt(GRefreshInterval));   

Answer 1

what you do is set up a system for this. Create an object that handle all your Timers:

var Timer = function () {
   var currentTimer;

   this.setTimer = function (func,time) {
      if (currentTimer) {
           alert("one timer already set");
      }else {
          currentTimer = setInterval(func,time);
      }
   }

   this.stopTimer = function () {
      clearInterval(currentTimer);
      currentTimer = null;
   }
}

Now you can use this code:

function doSomething() {...}      // function example
function doSomethingElse() {...}  // function example

var MyTimer = new Timer();

MyTimer.setTimer(doSomething,1000); // this will run

MyTimer.setTimer(doSomethingElse,1000); // this will not run

The second one will not run because the other one is active.
to make it work you have clear the first one.

MyTimer.stopTimer(); // will clear the current timer then you can run another one
MyTimer.setTimer(doSomethingElse,1000); // will run perfectly