Send button not working, when click nothing happens

Hello there,

I have some problems with your plugin "Contact Widget". I installed it yesterday and the plugin send button isn't working.

The button isn't clickable. Only works when change the button type from "button" to "submit", but even that the message isn't send.

Try it here, please:

http://registrosanitarios.com.ec/contactanos/

So, any help?