title: How to put a javascript code to onclick event Odoo 8.0
body: <p>I already searched a lot of posts, here and in the odoo forum, but i didn't get any example that works. What i want to do is very simple in fact. I need to put a javascript code to a button onclick event, in the button that already exists. All my attempts have failed. I think that my js code runs before right time, because it's always runs, so the HTML element still doesn't exists and nothing is added to element when it is loaded. </p>
  
  <p>One of a many ways that i have tried bellow:</p>
  
  <pre><code>(function(){
      "use strict";
      var _t = openerp._t;
      var _lt = openerp._lt;
      var QWeb = openerp.qweb;
      var oepetstore = openerp.oepetstore = {};
  
      oepetstore.Test = openerp.Widget.extend({
          events: {            
              // events binding example            
              "click .button_test": "myFunctionHandler",        
          },                
  
          myFunctionHandler: function(){            
              alert('ok from button!');
          },                
  
          start: function() {            
              alert('ok!'); //this code always runs        
          }    
      });
  
      var pet = new oepetstore.Test();
      pet.appendTo(openerp.web.$el);
  
      return oepetstore;
  })();
  </code></pre>
  
  <p>Thanks for any help!</p>