Hey All,

I have searched and searched and I am sure I overlooked it somewhere.

I am wanting to put an anti-spam thing on my contact form.

Something like 2 + 4 =

Then they have to put the answer (6) in the blank or the form will not send.

Is there anywhere I can read how to do this?

Heres what I have for the form:

Code:
<form name="htmlform" id="contactus" method="post" action="mail.php">
<table width="450px">
</tr>
<tr>
 <td valign="top">
  <label for="full_name">Full Name *</label>
 </td>
 <td valign="top">
  <input  type="text" name="full_name" maxlength="50" size="30">
 </td>
</tr>
 
<tr>
 <td valign="top">
  <label for="company">Company *</label>
 </td>
 <td valign="top">
  <input  type="text" name="company" maxlength="50" size="30">
 </td>
</tr>
<tr>
 <td valign="top">
  <label for="email">Email Address *</label>
 </td>
 <td valign="top">
  <input  type="text" name="email" maxlength="80" size="30">
 </td>
 
</tr>
<tr>
 <td valign="top">
  <label for="telephone">Telephone Number</label>
 </td>
 <td valign="top">
  <input  type="text" name="telephone" maxlength="30" size="30">
 </td>
</tr>
<tr>
 <td valign="top">
  <label for="website">Website Address</label>
 </td>
 <td valign="top">
  <input  type="text" name="website" maxlength="80" size="30">
 </td>
</tr>
<tr>
 <td valign="top">
  <label for="comments">Comments *</label>
 </td>
 <td valign="top">
  <textarea  name="comments" maxlength="1000" cols="25" rows="6"></textarea>
 </td>
 
</tr>
<tr>
 <td colspan="2" style="text-align:center">
  <input type="submit" value="Submit">
 </td>
</tr>
</table>
</form>