$ is not defined error in firefox with jquery

I check that Firefox loads jquery. However I have an error telling, "$ is not defined" in firebug.

<script type="text/javascript" src="http://code.jquery.com/jquery-1.5.2.min.js"></script>
<sc开发者_Go百科ript type="text/javascript" src="going.js"></script>

And going.js has the following.

 if ($.browser.webkit) {
    $("body").addClass("chrome"); 

}

I tried $(document).ready(function(){ // my code here });, but it gives the same error.

Could anyone tell me how to fix this?

Thanks in advance.

Update: http://jsbin.com/uwopi3/3/edit

Place both scripts just before closing </body> and your jQuery code right after.

UPDATE Like i mentioned you need to place your code after your jQuery scripts.

<script type="text/javascript" src="http://code.jquery.com/jquery-1.5.2.min.js"></script>
<script type="text/javascript" src="going.js"></script>
  <script>
     if ($.browser.webkit) {
  $("body").addClass("chrome");
     }
</script>

Another thing you can do if this problem persists is use jQuery.browser instead of $.browser and see if it works. It may be a conflict between the plugin and jQuery script.