Form Validation Help Needed Please

I am knew here so hi to everyone, I have been told by a friend that this site is particularly helpful so here goes.

I have a form that i want to ensure is filled out correctly before the user is able to proceed. I am also advised that Javascript is the easiest way to do this, however i have no idea how to implememnt it.

http://chimp.cc/start.htm

If the user fails to fill out the terms and conditions box with a "Yes"when the user clicks submit, i want a message to pop up to tell them to complete it.

and to return the user to that field for completion.

I honestly have no idea how to do this, can someone please help me.

Cheers

Andy

Hi,
Do a script validation in the form as below. Call the below function while clicking the submit button

Hope this helps

Something like this:

However, instead of having a textbox asking for the user to type in Yes, ideally a radio button is used for the same.