How to use jQuery in Firefox addon?

Question

I want to use jQuery in the sidebar of my Firefox extension. This is how I enable jQuery in sidebar.xul

  <script type="application/x-javascript" src="chrome://myaddon/content/
  scripts/jquery/js/jquery-1.4.4.min.js"/>

  <script type="text/javascript">jQuery.noConflict();</script>

The first question is why do we use a function jQuery.noConflict()?

I tried to solve some other issues, but it did not work for me.

However, this does not work for me on FF 3.6.13:

<script type="application/x-javascript" 
       src="chrome://myextension/content/scripts/jquery/js/jquery-1.4.4.min.js"/>
  <script type="text/javascript">
    jQuery.noConflict();
    jQuery(document).ready(function () {
        alert("hello");
    });
 </script>

Answer 1

, , mootools, YUI .. , jQuery, $() . , $() jQuery ​​ . , jQuery jQuery.noConflict().

,

 var $j = jQuery.noConflict();

jQuery, $j() $()

firefox, , firebug. , jquery, . http://getfirebug.com/commandline

Answer 2

hello?

<script type="text/javascript">
    jQuery.noConflict();
    jQuery(document).ready(function () {
        alert("hello");
    });
</script>

, jQuery. , .