MediaWiki:Common.js

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

• Firefox / Safari: Hold Shift while clicking Reload, or press either Ctrl-F5 or Ctrl-R (⌘-R on a Mac)
• Google Chrome: Press Ctrl-Shift-R (⌘-Shift-R on a Mac)
• Internet Explorer / Edge: Hold Ctrl while clicking Refresh, or press Ctrl-F5
• Opera: Go to Menu → Settings (Opera → Preferences on a Mac) and then to Privacy & security → Clear browsing data → Cached images and files.

/* Any JavaScript here will be loaded for all users on every page load. */
<form>
<input type="button" value="Back to Previous Page" 
onClick="javascript: history.go(-1)">
</form>

$( function () {
	var elems = document.getElementsByClassName('editsection'); // *** NOTE: ClassName may need to be 'mw-editsection' instead
	for (i = 0; i < elems.length; i++) {
		var span = document.createElement('span');
		var link = document.createElement('a');
		link.href = '#top';
		link.appendChild(document.createTextNode('back to top'));
		span.appendChild(document.createTextNode('['));
		span.appendChild(link);
		span.appendChild(document.createTextNode('] '));
		elems[i].insertBefore(span, elems[i].firstChild);
	}
});