JavaScript Validation

I have the following javascript function fire when a specific submit is clicked. It changes the opacity of the viewport and displays an image telling the user to wait while the form is processed serverside. It works, but I only want it to fire if the form passes clientside validation. How do I check that the clientside passed validation?

$(function($)
{
$('#get_numbers').click(function()
{
$.blockUI(
{
message: '<h1><img src="/path/to/image/busy.gif" /> Please wait...<\/h1>',
timeout: 0
});
});
});

You can use the fake event variable ONSUBMITTING . You can assign Javascript code to it that will be executed during the ONSUBMIT event check, only if the form is valid, right before it is submitted.

Perfect!

Thank you!