How to trigger an input event with jQuery?

Question

I want to add 'a' to the value of input when click a button

Here is my code(with jQuery 1.4.4):

$("#button").click(function(){     $("#input").trigger("focus");     var e = jQuery.Event("keypress");     e.which = '97';     $("#input").trigger(e); }) 

However, it seems only to trigger "focus" event, but failed to "keypress".

Answer 1

I used the trigger method:

$('#selector').val(quantity).trigger("input");