A simple highlighting plugin based on the jquery plugin found at http://www.frightanic.com/projects/lenient-jquery-highlight-plugin-javascript/

1. Unzip to the mod directory

2. Activate the plugin through the admin plugins page

3. Set custom highlight color in plugin settings (flush caches if necessary)

This plugin highlights matching words on any page based on the 'highlight' query parameter.

eg.

http://example.com?highlight=test

would highlight the word 'test' everywhere it occurs on the page.

The color of the highlight can be overridden in the query parameter also

eg.

http://example.com?highlight=test&highlight-color=%23000000

would highlight the word 'test' with black instead (note the %23 is the urlencoded #)

Additionally, this plugin automatically appends search terms from the default Elgg search results to internal links. This means if you search for the word 'test' and get a blog post result, if you click on that result and view the blog post, the word 'test' would be highlighted automatically.