[jQuery] get a fancybox/lightbox from a FORM?

[jQuery] get a fancybox/lightbox from a FORM?


Is there a way to get a fancybox (<http://fancy.klade.lv/>) or any
other lightbox from submitting a FORM (with an image button)?
HTML looks like this:
<form action="/ACTION/FastFindObj" method="post">
<input name="fastfind" class="fastfind" value="3463" type="text">
<input src="/images/ic_ml_lgl.gif" name="weiter" type="image">
</form>
These won't do:
    $("form").fancybox();    
    $("input").fancybox();
    $("input[name='weiter']").fancybox();
Anyone spotting my mistake or having a workaround or an alternative
script? Thanks in advance