jquery delay timer

gistfile1.js

function delayTimer(delay){
     var timer;
     return function(fn){
          timer=clearTimeout(timer);
          if(fn)
               timer=setTimeout(function(){
               fn();
               },delay);
          return timer;
     }
}

// USage

<input type="text" value="" />
<a href="">Stop Timer</a>
var inputDelayer=delayTimer(500);
$('input').keyup(function(){
     inputDelayer(function(){
          alert('user has stopped typing');
     });
});
$('a').click(function(){
     //both of these clear the timer
     clearTimeout(inputDelayer());
     inputDelayer();
     //both of these clear the timer
});