[gb2world]

For the IE7 developer tool - there is no select or mouse over (that I see) - you actually have to step through the code, and as you select it, it will border the region in the browser.

For the IE8 developer - similar to Firebug, there is an arrow under the HTML tab. Once that is selected, you mouse over elements in the browser, then select, and it takes you to the html code.

Yours was tricky because the div was being repositioned lower on the screen and disappearing. You could step through the code in the developer window - watch the areas being bordered, then see where things started moving down and disappearing.