Westciv XRAY is a bookmarklet javascript 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.
Webuilder and other Blumentals product use a similar -simply - javascript.
If u want a replace this plugin:
1, download location the script http://westciv.com/xray/thexray.js
2, rename xray.js
3, copy/overwrite - before backup old xray.js - your installed program data folder
(eg C:\Program Files\Webuilder2007\data\)
Limitation:
This plugin work only IE preview.
(If use as bookmarklet, work many browser (ff, ie, safari)
Here a screenshot:
Cheers