Mike E,
If you think the spam is being submitted by a bot you can also use a
technique where you use CSS (not <input type="hidden" />) to hide an
extra field on the form. Assuming the user has CSS on they'll never see
the field. Bots won't know the difference. If data is submitted for the
field ignore the submission. I've used this technique successfully.
Here is an example for partial form markup from a web site comments form.
<p class="input">Please enter your e-mail address: <input size=44
name="f_email_address" value="" class="ta"></input>
<span class="errMsg"></span></p>
<p class="input confirm">Please confirm your e-mail address: <input size=44
name="f_conf_email_address" value="" class="ta"></input>
<span class="errMsg">Please Contact us if you see this warning</span></p>
Notice how the f_conf_email_address field has an extra class "confirm".
That class' CCS hides the field and the error message. Bots have no idea
they aren't supposed to insert data in that field.
hth,
Brad Perkins
Michael Check wrote:
> captcha
>
> http://www.captcha.net/
>
> Michael Check
>
>
>
> On Tue, Jul 28, 2009 at 7:42 PM, Mike Erickson<[email protected]> wrote:
>
>> Hey Gang
>>
>> i am curious, has anybody done any image validation on their forms? If
>> so, what method have you used. I need to stop some severe spam submissions
>> on a client server and I figured this would work well
>>
>> Any and all recommendations would be greatly appreciated.
>>
>> Regards,
>>
>> Mike Erickson, President
>> Automated Solutions Group
>> [email protected]
>>
>>
>>
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