我使用 IE8开发人员工具（这是包括开箱即用），它可以显示样式跟踪。

I am using IE8 Developer Tools (which is included out of the box), it can show style tracing.

IE7也有微软提供的添加 IE Dev工具栏。

IE7 have also Microsoft-supplied add on called IE Dev Toolbar. Have not used this extensively though.

您使用的是什么版本的IE？

What version of IE are you using?