write a directory tree can be of any level, can change the leaf nodes on the icon

tree
....\childicon.gif
....\close.gif
....\e.gif
....\file.gif
....\file1.gif
....\folder-expanded.gif
....\folder.gif
....\folder1.gif
....\folder2.gif
....\folder3.gif
....\folder4.gif
....\icon-closeall.gif
....\icon-expandall.gif
....\index.htm
....\list.gif
....\menu.css
....\menu.js
....\minus.gif
....\minusbottom.gif
....\minustop.gif
....\open.gif
....\parenticon.gif
....\plus.gif
....\plusbottom.gif
....\plustop.gif
....\powericon.gif
....\powertousericon.gif
....\rooticon.gif
....\submenu.css
....\test1.gif
....\usergroupicon.gif
....\usericon.gif

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