ext去掉tree的图标

<style type="text/css">
        .x-tree-node-collapsed .x-tree-node-icon {
             height:0px;width: 0px;
        }

        .x-tree-node-expanded .x-tree-node-icon 
        {
             height:0px;width: 0px;
        }
        .x-tree-node-leaf .x-tree-node-icon
        {
             height:0px;width: 0px;
        }
</style>    

 

 将上面代码复制到html中