You can add a Google supported captcha spam protection to your form hosted by popular blog platforms including: Wordpress.com and Blogger.com
1. Get a reCaptcha key from Google: http://www.google.com/recaptcha
2. Paste this script into your form between the <form> and </form> tags:
<div>
<script src="http://www.google.com/recaptcha/api/challenge?k=your_public_key" type="text/javascript"></script>
<noscript>
<iframe src="http://www.google.com/recaptcha/api/noscript?k=your_public_key"
height="300" width="500" frameborder="0"></iframe><br>
<textarea name="recaptcha_challenge_field" rows="3" cols="40">
</textarea>
<input type="hidden" name="recaptcha_response_field"
value="manual_challenge">
</noscript>
</div>
<br />
<br />
3. Replace in the above "your_public_key" with your own public key obtained in step 1.
1. Get a reCaptcha key from Google: http://www.google.com/recaptcha
2. Paste this script into your form between the <form> and </form> tags:
<div>
<script src="http://www.google.com/recaptcha/api/challenge?k=your_public_key" type="text/javascript"></script>
<noscript>
<iframe src="http://www.google.com/recaptcha/api/noscript?k=your_public_key"
height="300" width="500" frameborder="0"></iframe><br>
<textarea name="recaptcha_challenge_field" rows="3" cols="40">
</textarea>
<input type="hidden" name="recaptcha_response_field"
value="manual_challenge">
</noscript>
</div>
<br />
<br />
3. Replace in the above "your_public_key" with your own public key obtained in step 1.
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