[jQuery] multiple submit sends with CSS Button

[Robert]

Hi,

i have a Problem with a CSS-Button. Evertime when I click the Button,
the formular will be send three times.

A normal input submit button does the same task exactly one time.

Here is my Code for this Button (only the first button is important,
Abort Button works fine at it is). jqeury 1.2.6 is included

<div class="buttonleiste">
      <a style="float: left; margin-right: 10px;"
onclick="trigger_form_submit(this, 'ok')" id=""
     class="button_ok button_all" href="javascript:;"><span
class="button">Login</span></a><input
      type="submit" style="display: none;" name="button[ok]"/>

      <a style="float: left; margin-right: 10px;"
onclick="trigger_form_submit(this, 'abort')" id=""
     class="button_abort button_all" href="index.php"><span
     class="button">Abort</span></a><input type="submit"
style="display: none;" name="button
       [abort]"/>
</div>

Thanks for your help