Javascript , event handler is always called, even if the event is not raised

Question

i have the following code which extends the JQuery and adds a method to the JQuery:

$.fn.attachWithMessage = function () {
  $(this).focusin(showMessage());
         


        

Answer 1

just remove the parenthesis

$(this).focusin(showMessage());

should be

$(this).focusin(showMessage);

Hope this helps