Im using the following function to hide a series of forms on a page:

$('.ask').toggle(function() {
      $(this).text('-').next('.addtitle').slideDown('fast');
    }, function() {
      $(this).text('+').next('.addtitle').slideUp('fast');
});

There can be anything from 0 to 5 forms on the page all with the class .ask

What I want to be able to do is to select one form NOT to hide, so the jQuery needs to hide all put one of the forms on the page randomly.

How can I achieve this?