MediaWiki:Common.js

Note: After publishing, you may have to bypass your browser's cache to see the changes.

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Google Chrome: Press Ctrl-Shift-R (⌘-Shift-R on a Mac)
Edge: Hold Ctrl while clicking Refresh, or press Ctrl-F5.

var cssLink = document.createElement("link") 
cssLink.href = "style.css"; 
cssLink.rel = "stylesheet"; 
cssLink.type = "text/css"; 
frames['fancybox-frame'].document.head.appendChild(cssLink);