Need help adding anti spam to registration page

[whatsthegoodwor]

I'm using asirra, a picture database instead of captcha on the registration page. I've got it working but have 2 problems: the proceed button requires 2 clicks instead of 1 and it can be bypassed by disabling javascript.

http://research.microsoft.com/en-us/...tallation.aspx Here's a little more about it. It has installation instructions but I'm not sure how to fix these 2 problems and install step 4 so that you can't bypass it.

Here's what I have so far, for step 2 I have this:

<form action="register.php?do=checkdate" method="post" onsubmit="return (MySubmitForm() && checkform(this));">

But it requires you to click the button twice, any way to fix it so it works with only 1 click?

I can't figure out step 4, any help?