Executing jQuery in a plugin

That snippet ‘works’ for me.

Is the script being printed at the bottom of the page? More specifically, does your theme call wp_footer. All themes should, but not all themes do call wp_footer which breaks plugins which rely on it.

For the record – you should not print scripts directly to the page. WordPress has a great API for handling JavaScript enqueing and dependency handling. See this codex page.

You may also find this question helpful too.

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