Substitution Captcha

Question

I came across http://www.kettletime.com.au/chance , where the user needs to drag the field with the number into another field to prove that he is a person.

How do you implement this? Any free library for this?

thanks

Answer 1

This seems to be one thing: http://www.webdesignbeach.com/beachbar/ajax-fancy-captcha-jquery-plugin .

How do you implement this?

Of course, you can implement your functions yourself (see other answers), but this plugin seems to be highly customizable :)

Any free library for this?

Yup, see link above.

Answer 2

I suggest using the jQuery library with the official jQuery UI plugin. Here is a demo and code:

http://jqueryui.com/demos/droppable/

Answer 3

You should take a look at JqueryUI. They have direct drag and drop.

http://jqueryui.com/demos/draggable/