Adding a basic CAPTCHA to a basic Registration Form

I'd like to add a basic CAPTCHA to this basic Registration Form.
Can you help me?

<form action='form_handle.php' method='post'>
<table border='0' padding='0' spacing='0' >
<tr>
<td>Company Name:</td>
<td><input type='text' size='35' name='company_name'></td>
</tr>

<tr>
<td>Address:</td>
<td><input type='text' size='20' name='address'></td>
</tr>

<tr>
<td>City:</td>
<td><input type='text' size='20' name='city'></td>
</tr>
<tr>
<td>State:</td>
<td><input type='text' size='4' name='ztate'></td>
</tr>

<tr>
<td>Zip:</td>
<td><input type='text' size='9' name='zip'></td>
</tr>

<tr>
<td>Contact Name:</td>
<td><input type='text' size='20' name='contact_name'></td>
</tr>

<tr>
<td>Phone Number:</td>
<td><input type='text' size='15' name='phone_number'></td>
</tr>
<tr>
<td>Email Address:</td>
<td><input type='text' size='15' name='email_address'></td>
</tr>

<tr>
<td>Description:</td>
<td><textarea name='Description' rows='10' cols='80'></textarea></td>
</tr>

<tr>
<td colspan='2' align='right'><input type='submit' value = 'Register'></td>
</tr>

</table>
</form>

Code (markup):

 

http://code.google.com/apis/recaptcha/docs/php.html

 

I second this, reCaptcha is a great tool! It's pretty easy to set up but give us a shout on here if you have issues. 

The idea of it is pretty neat though, using Captcha to transcribe books into electronic form.  

 

hi chrisj,

try using reCaptcha as suggested by freelancewebaz

i also use it my websites because it's easy to implement and this has minimal load on my server as the captchas are generated in another server provieded by reCaptcha

kindest,
abhishek kundu

 

recaptcha is the best but if recaptcha is too fancy for you try using Securimage