Remove Send button in contact & send to a friend forms

[jmcamps]

Hello,

 

I have implemented the slide captcha module in my site and, as the email in the contact and send to a friend forms is sended once you slide the arrow of the slide captcha, is there any way to remove the original send button?.

 

I do not want to change the global CSS style in the global.css file, as this affects to the rest of the site buttons.

 

Thanks.