VS 2010 非常不错的 JS 和 CSS 伸缩插件!
This extension provides outlining and matching braces highlighting features for Visual Studio JavaScript and CSS editor.
Works both in JS/CSS files and HTML script/style blocks.
Outlining is like in C# editor. It outlines {}s, []s and #region tags.
There's also an options page in Tools -> Options menu where you can specify what will be collapsed by default when you open a file.