Writing a userscript that replaces a background image

Question

This is the code

// ==UserScript==
// @name           Wood Background
// @namespace      http://www.nationstates.net/nation=ellorn
// @description    Changes bac         


        

Answer 1

You can define your own user-stylesheet to overwrite the author stylesheets of websites. I think this would be better suited to alter CSS than writing javascript.

Here is a short introduction on how to achieve that.

Besides from that your code should work in general if you hand over the CSS-string correctly (fixed quoting and linebreak):

var css = "* { background: #00ff00 url('http://awesomewallpapers.files.wordpress.com/2010/01/wooden_top.jpg') no-repeat fixed center;  }";

addCss ( css );

Note however, that * will break, since you are applying the wooden background to every element, not only your background-element (HTML or body or a wrapper div).