User:O/cavendish.css

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Documentation for this user script can be added at User:O/cavendish. This user script seems to have an accompanying .js page at User:O/cavendish.js.

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#header h1 a {
        background: transparent url("http://developer.mozilla.org/docs/skins/cavendish/devmo_header_logo.gif") no-repeat;
        width: 350px;
}