## StringtreeNode.icon

### Overview[ depends on jquery.ztree.core js ]

URL path of node's custom icon.

1. If you only set the 'icon' attribute to parent node, the parent node will only show one icon when it is expanded or collapsed.

2. If you need to show two icons when it is expanded or collapsed, please set the 'treeNode.iconOpen' and 'treeNode.iconClose' attribute.

3. If you need to use css to set the custom icon, please set the 'treeNode.iconSkin' attribute.

Default: undefined

### String Format

Icon image url can be a relative path or absolute path.

If use a relative path, please note the relationship between icon image and the page, ensure the correct image path.

### Examples of treeNode

#### 1. Set the custom icon

    var nodes = [
    	//Only show one icon when it is expanded or collapsed.
    	{ name:"Parent Node 1", icon:"/img/parent.gif"},

    	//Show two icons when it is expanded or collapsed.
    	{ name:"Parent Node 2", iconOpen:"/img/open.gif", iconClose:"/img/close.gif"},

    	//the custom icon for leaf node
    	{ name:"Leaf Node", icon:"/img/leaf.gif"}
    ]