I have an ASP.NET page where I need to figure out where the style for a textbox is coming from. There are several style sheets defined for the page and I want to be able to use some sort of tool / editor that will tell me what styles were used and from what file(s) to render the textbox.
Thank you.
In IE you can use the IE Developer Toolbar. But I'm a fan of FireBug for FireFox.
From comments: Bernard Chhun recommended FireBug Lite as an alternative to IE Dev Toolbar. It also works for Opera and Safari too.
Most browsers have developer tools (build-in or as extension) that can show you the cascading order of the applied rules.
For Firefox there is the Firebug extension, Safari (WebKit) has Web Inspector, Opera has Dragonfly and for the Internet Explorer there is the Internet Explorer Developer Toolbar.
The web developer toolbar for Firefox has CSS and element inspectors which I find very useful.
You can also modify the CSS in the browser so you can tweak layout without going back to your IDE