My original page with the working plugin (and jquery 1.2.3)

http://www.brightsideresumes.com

My test page:

http://brightsideresumes.com/tmp.html

Once I go above about jQuery 1.3 the plugin stops working like it should. I'm no hardcore programmer and having a hard time figuring out what the issue could be. I was hoping someone might be able to point me in the right direction right off - I'm guessing something was deprecated or changed around v 1.4 of jQuery.

The haccordion code is:

2. // SeViR Simple Horizontal Accordion @2007
3. // http://letmehaveblog.blogspot.com
4. jQuery.fn.extend({
5.   haccordion: function(params){
6.     var jQ = jQuery;
7.     var params = jQ.extend({
8.       speed: 500,
9.       headerclass: "accheader",
10.       contentclass: "acccontent",
11.       event: "click",
12.       contentwidth: 350
13.     },params);
14.     return this.each(function(){
15.  this.opened = jQ("."+params.contentclass,this).filter(".visible").prev();
16.  
17.       jQ("."+params.headerclass+" a",this).bind(params.event,function(){
18.         var p = jQ(this).parent().parent()[0];
19.         p.addClass("notice");
20.         if (p.opened != "undefined"){
21.           jQ(p.opened).next("div."+params.contentclass).animate({
22.             width: "0px"
23.           },params.speed);
24.         }
25.         p.opened = jQ(this).parent();
26.         jQ(p.opened).next("div."+params.contentclass).animate({
27.           width: params.contentwidth + "px", 
28.           display: "visible"
29.         }, params.speed);
30. return false;
31.       });
32.     });
33.   }
34. });