javascript - Very simple jquery custom function throws error -

i have following code:

$(document).ready(function() {     $.fn.addremovebutton = function() {         alert(1);     };      $.addremovebutton(); });

and following error message firebug:

typeerror: $.addremovebutton not function $.addremovebutton();

why , how can fix this?

you need define selector, try this:

$(document).ready(function() {     $.fn.addremovebutton = function() {         alert(1);     };      $(document).addremovebutton(); });

Brande