Custom Icon - iconSkin

[ File Path: core/custom_iconSkin.html ]

1, Explanation of setting
- Custom icon does not require special configuration setting.
2, Explanation of treeNode
- Use the node data iconSkin attributes and css show custom icon.
- See the API documentation for more related contents.
3、Other explanation
- Because of the time limitation, demo uses png images, if you need transparent images in IE6 browser, make a gif image, or use a special 'css filter' on ie6 browser.