JavaScript

A collection of helpful JavaScript links and scripts.

XRAY

XRAY let's you click on elements on the page and see specific information about them: size, position, and other detailed CSS assignments such as the inheritance hierarchy.
Works in IE6+, FF, and Safari

JASH

JASH gives you command-line JavaScript access to the page. This one is a bit different in that you have to serve the script and CSS file they provide. Kind of a headache, but this tool is worth it as far as helping you debug your scripts. The best part? It works in IE ;)
Works in IE6+, FF, and Safari

Pretty JSON

Pretty JSON  will pretty it up (and validate it!) for readability.
Works in FF

WTFramework

WTF will tell you what JavaScript framework is used on a specific website.
Works in IE6+, FF, and Safari

Firebug Lite

It's like Firebug for IE and Safari!! Missing a few features but this utility is extremely useful in troubleshooting pages.
Works in IE6+ and Safari. Use regular Firebug in Firefox!

MODIv2 (Mouse Over DOM Inspector)

MODIv2 Allows you to view and manipulate the DOM of a web page.
Works in IE6+ and FF

Get Passwords

Say you visit a site that has your password stored automatically (but covered by asterisks or dots or whatever), and you really need to know what it is! Or you swear you're typing in the correct password... but you can't see it. Plug this big chunk of JS into the browser and a pop-up will present it to you.
Works in IE6+, FF, and Safari

javascript:(function(){var s,F,j,f,i;
 s = ""; F = document.forms;
 for(j=0; j<F.length; ++j) { f = F[j];
 for (i=0; i<f.length; ++i) { if (f[i].type.toLowerCase() == "password") s += f[i].value + "\n";
 } } if (s) alert("Passwords in forms on this page:\n\n" + s);
 else alert("There are no passwords in forms on this page.");
})();

Edit a Website

javascript:document.body.contentEditable='true'; document.designMode='on'; void 0

Edit any web page you're looking at on the fly. Poke this JS into your browser, and click around on the page to edit text and move things around. Works in IE7 and FF