轻松修改TreePanel 的图标样式 和 背景图片

给树形结构定义图标 的css

.x-tree-node-collapsed .x-tree-node-icon{background-image:url(/foreigns/back/img/icon/book.png);}
.x-tree-node-expanded .x-tree-node-icon{background-image:url(/foreigns/back/img/icon/book_open.png);}
.x-tree-node-leaf .x-tree-node-icon{background-image:url(/foreigns/back/img/icon/page_white.png);}

加一个背景图片

var tree = new Ext.tree.TreePanel({
		bodyStyle:'background:url(/foreigns/back/img/logo/bgb.jpg) repeat;', 
		baseCls:'bgimage',
		border:false,
		root:root,
		loader:loader,
		rootVisible:false
	});