event_firing.js

function fireEvent(element,event, keyCode){
  if(document.createEvent){
    // dispatch for firefox + others
    var evt = document.createEvent("HTMLEvents");
    
    if(keyCode !== undefined){
      evt.keyCode = keyCode;
    }
    
    evt.initEvent(event, true, true ); // event type,bubbling,cancelable
    return !element.dispatchEvent(evt);
  }
  else{
    // dispatch for IE
    var evt = document.createEventObject();
    return element.fireEvent('on'+event,evt)
  }
}