Bookmarklets are small Java scripts which can be stored in Internet Explorer to accomplish helpful little tasks - much like Chrome apps and Firefox add-ons. This page, http://www.phpied.com/checktoggle-em-all/, contains a handy little bookmarklet that will allow you to toggle all of the checkboxes on a single page. So if there are 20 checkboxes, and you select 2, this bookmarklet will check off the other 18. This is very useful when you're dealing with sites like the old [non-Advance] version of Lexis Courtlink which has checkboxes for documents in search results, but not an option to select them all.
Activate the bookmarklet on phpied.com by dragging the area around where it says, 'Toggle 'em all' to the menu bar where there is space for web page links. This is the Favorites Bar - see View . . .Toolbars in IE.