JQuery slide.Toggle menu firefox problem

Well, take a look at www.creade.biz

Now click o A4 ITEM and JQuery to see slideToggle in action. It works fine in IE but crash in Firefox. If you try to close the opene A4 ITEM It will reopen. How I can fix It?

Thanx for your help!

From stackoverflow

• Your XHTML document has a whole bunch of validation errors:

  • Using a <div> tag as a direct child of a <ul> tag.
  • Using <li> tags without a <ul> (or <ol>) tag as its direct parent.
  • Using <p> tags as children for <span> tags.

  If you change <div class="collSub"> into <li class="collSub">, start a new <ul> tag for the nested list elements under the A4 item, and change all of your <p> tags into <span> tags, it'll work out for you.

  Also, for future reference, you can check the markup validity of your XHTML documents by using The W3C Markup Validation Service.

  natspace : Thanx a lot Tinister! You're a guru!