jQuery/jQTouch Navigation problem

jQuery/jQTouch Navigation problem

Hi,

this is my first question in this forum:

I'm working with jQuery/jQTouch for app navigation.

I use the class "arrow" for my menu items like this:

<ul class="rounded">
    <li class="arrow"><a href="#xyz"><img border="0" src="images/test.gif">dummy</a></li>
</ul>

It works so far. When the user reaches the last menu item I want to draw something in a div.
Therefor I use javascript onclick:

<ul class="rounded">
    <li class="arrow"><a href="#xyz" onclick="test('123')"><img border="0" src="images/test.gif">dummy</a></li>
</ul>

With IPhone/IPad I have the problem that when the user makes a little contact with the finger there is no onclick reaction.
Only the href works and an empty div appears.
With a "normal" contact both works!?
Is it not allowed to combine href with javsscript onclick? Or in which way I can use a navigation menu item for a javascript
function?

Please give me a short feedback.

Kind regards
Uli