XRAY is a bookmarklet for Internet Explorer 6+, and Webkit and Mozilla based browsers (including Safari, Firefox, Camino or Mozilla). Use it to see the box model for any element on any web page.

Simply paste this into your browser:

javascript:function%20loadScript(scriptURL)%20{%20var%20scriptElem%20=%20document.createElement('SCRIPT');%20scriptElem.setAttribute('language',%20'JavaScript');%20scriptElem.setAttribute('src',%20scriptURL);%20document.body.appendChild(scriptElem);}loadScript('http://westciv.com/xray/thexray.js');