The following JavaScript functions are a short-cut for repetitive hand-editing of URLs. Don't click on these links: instead, pop up the context menu (right-click or option-click) and bookmark the links directly. I put these bookmarks in a sub-menu called "URL" that sits next to my Bookmarks menu on the toolbar, as pictured to the right. You do that by making a new folder in your bookmarks, then dragging that folder to the toolbar.
	[ up ]	If the URL contains a "?" search term, this will remove it. Otherwise, it will take off the part of the URL after the last "/". So, when executed successively, it will load the pages: http://.../AA/BB/CC.html?xx&yy http://.../AA/BB/CC.html http://.../AA/BB/ http://.../AA/ etc.
	[ + ]	If the URL contains a number, this increments that number (being careful to pad with the same number of leading zeros.) So, when executed successively, it will load the pages: http://.../img_0998.jpg http://.../img_0999.jpg http://.../img_1000.jpg http://.../img_1001.jpg etc.
	[ - ]	If the URL contains a number, this decrements the number, as above.
	LJ style=mine	Append &style=mine to LiveJournal URLs: this will cause the page to display in your LJ style instead of in whatever eyeball-searing layout the page's author has chosen.
	Flickr Image	Sometimes Flickr pages try to prevent you from copying or saving images; they do this by using CSS to overlay a transparent "spaceball.gif" image over the main image, so your copy/drag hits that instead. This bookmarklet extracts the real image from the page and loads it into the window by itself.
	YouTube Verify	If a YouTube URL doesn't work because you aren't logged in and the content might be "inappropriate for some users", this bookmarklet will show you the video anyway, and let you decide for yourself what the weasel-word "appropriate" means.