Question

Net Web Forms, I’m looking for a solution to avoid bot and spammer using my online contact form.

Captcha is pretty safe solution but sometimes could be to “Difficult” for inexperience user to use (in my opinion).

Here some solution alternative I found, I would like to know if you implement one of theme in a real world scenario, wich is the safest and easier to implement.

1 – Ajax Tookit Nobot

2 -Jquery Side Locker (her one example
but there are many of theme). What is the best?

3 – Drag and Drop solution like this one

Thanks for your time.

Answer 1

See if a honeypot captcha helps. It is simple, does not require JavaScript and does not require user interaction. It works because a typical spambot will try to fill out all fields present of a form. This you can detect on the server side:

<form action="" method="post">
    <label>Name</label>
    <input type="text" name="Name">
    <br />
    <label>Please leave this field empty</label>
    <input type="text" name="Email">
    <br />
    <input type="submit" />
</form>

Server side code (PHP):

<?php
if($_POST["Email"] != "") {
    die("Thank you for spamming!");
}

Server side code (ASP.NET/C#):

void Page_Load(object sender, EventArgs e)
{
    if(Request.Form["Email"] != "") {
        Response.Write("Thank you for spamming!");
        Response.End();
    }
}