[jQuery] checkbox in li keeps unchecking itself

[Gabor Szabo]

Hi,

I have the following html

<ul>
   <li><input class="xx" type="checkbox"> text
      <ul>
         <li></li>
     </ul>
   </li>
</ul>

with code like this:

   $("input").filter(".xx").click(function(){
        //alert('name: ' + $(this).attr("name") + '  ' + 'class: ' + $
(this).attr("class") + '  ' + 'id: ' + $(this).atr("id"));

        // code should come here
        return false;
    });

  $("li").click(function(){
    $(this).children().children("li").each(function() {
            if ($(this).css("display") == 'none') {
                $(this).show();
            } else {
                $(this).hide();
            }
        });
        return false;
    });

The second function is supposed to open/close child <ul>-s when
clicking on the "text"
of a list item. This works well.
The first function is supposed to do some other stuff but I am stuck
as any time I click
on the checkbox it gets checked and then immediately afterwards
unchecked.
I can see this happening if I enable the alert.

How can I convince it to stay checked and to do my code in the upper
code and not not trigger
the "li" related code in the second function?

regards
    Gabor