CSS image Buttons that use INPUT

[havoc8]

I am looking to do CSS buttons that use the INPUT tag.

Here is an example https://www.telerik.com/login.aspx

You can see it uses the <INPUT> style and has rounded corners. I also woulld like to combine Classes so I can add a icon, like <Input class="button checkmark">

I have searched the web high and low looking.. and everyone I found uses the <a href>

EXPERTS? Links would be awesome..

[bluewalrus]

Could you post the code you have thus far or a link to your page?