Script UI Event Listener

##Event Listener on click actions Have a look at jongwares JavaScript Reference Guide here --> written for this stackoverflow

    var win = new Window ('dialog'); // Build a dialog
    /**
     * First argument: the UI resource 
     * Second: the size. If it is undefined it will be calculated
     * by the size of the text
     * Third: the text that appears on the button
     */
    win.button = win.add ('button', undefined, "Button");
    /**
     * now add the event listener to the action 'click' and pass 'k'
     * as the pressed keys 
     */
    win.button.addEventListener ('click', function (k) {
          if (k.shiftKey) {
          alert("foo"); // shift is clicked
          }else{
            alert("bah"); // now its not
          }
      });
    win.show (); // show the dialog