Is there simple any way to apply a "CSS Style Comparision" of a same area in html?

I am encountering one problem and it is this: I am having a different size of the same a开发者_如何学Crea in my asp.net page after a post-back. So I believe for some reason the style applied to that area changes, most likely.

And this made me to think if there is a way or a tool to compare 2 parts of a web page in terms of styling by highlighting the style property differences?

Something like a CSS comparison.

Is there a way to achieve such a thing?

thanks

I would use Firebug to inspect the styles and then perhaps use a diff tool to compare them.