[Deff]

<script src="http://code.jquery.com/jquery-latest.js"></script>
<input id=btn type="button" />
<script>
$('#btn').click(function () {
      test($(this));
});		
var Id0Timeout;	
function test(a) {
      clearTimeout(Id0Timeout);
          Id0Timeout= setTimeout(function () {
              alert('a1');
          }, 3000);
}
</script>

script