adding your own terms and conditions ?

The ProBoards registering agreement can't be modified. However, you can add a page with your own T&C before the register page

Bottom of Global Header:

<div id="rules" style="display: none;">
Rules Go Here

<form onsubmit='disable(this)'>If you agree to these terms, please click continue <input type='button' onclick='location.href="/index.cgi?action=register"' value='Continue'></form>
</div>
<div id="forum">


Global Footer:

</div>

<script type="text/javascript">
<!--
/* extra register page */

var newRule = document.getElementById('rules').innerHTML;
var a = document.getElementsByTagName("a");
if(location.href.match(/ion=preregister/)) {
var forum = document.getElementById('forum')
forum.getElementsByTagName('td').item(3).firstChild.innerHTML = newRule
} else {
for(r=0; r<a.length; r++)
{
if(a[r].href.match(/action=register/))
a[r].href="/index.cgi?action=preregister";
}
}
//-->
</script>

I used this code and I have an error. When I go to register (after logging out) it says "An error has occurred". Could you please take a look at my forum and see what I have done? Could it be a conflict with other codes I am using?

marthamatthews.proboards25.com/index.cgi
Martha