Rails - Add style/image to button_to

I'm developing in rails right now and I was wond开发者_如何转开发ering if there are any easy ways to add some style to the button_to control.

Can you add styling to the

 <%= submit_tag 'Log in' %>

or

 <%= button_to "Show Me", {:controller => 'personal', :action => "add" } %>

It would be great to change the color....But brownie point if someone can tell me how to make it an image

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Since you're using an image, there is no reason to use button_to instead of link_to, "button look" will be lost to the user. You can create an image with a link like so:

<%= link_to image_tag("rails.png"), {:controller => 'foo', :action => "bar" } %>

If, for some reason, you need to use button_to, you can give it a CSS class and apply some styles via that:

 <%= button_to "Show Me", {:controller => 'personal', :action => "add" }, {:class => "buttonTo" } %>

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In addittion to Mike's very fine pointer to using a pre-defined :class, you can also go for :style and define the CSS inline. Helps a great deal if you want to define your style on the fly:

<%= button_to "Show Me", {:controller => 'personal', :action => "add" }, {:style => "background: #{obj.colourname}" } %>

(With obj being some model instance that stores some HTML colour value at the colourname attribute.)