instant search

instant_search.js

$(document).onready(function(){
   var _timerId = 0;
 
   $("searchButton").keyup(function(){
      window.clearTimeout(_timerId);
      _timerId = window.setTimeout(function() {
         ...perform actual search...
      }, 170);
   }).keydown(function(){
      window.clearTimeout(_timerId);
   });
});