To give you a very useful and useful resource Manager tree-type directory of the original code

Primitive code from the Internet to download, after I rewrite, more powerful, more convenient to use,
can have an infinite level of directory, one-time load, you can set the tree node and leaf node color and icon, can expand and shrink, you can display the current location of the path, click on the tree node only in the expansion of the tree node to display the hyperlink, but, according to the test, a one-time load 500 nodes when the browser will display " The script will slow down the browser "prompt, however, choosing not to cancel the execution does not affect the browser's performance.