extjs 怎么给hidden动态赋值

var rightClick = new Ext.menu.Menu({

id : 'rightClickCont',

floating : true,

plain : true,

items : [
{

id : 'add-node',

text : '新增分类',
iconCls : 'icon-add x-fa fa-plus-circle',
// 增加菜单点击事件

handler : function() {
addResourceWin.setTitle('新增分类');
addResourceWin.setIconCls('icon-add');
addResourceWin.animateTarget = "add-node";
addResourceWin.show();

}

},
{

id : 'addchild-node',

text : '新增子分类',
hidden : true ,
iconCls : 'icon-add x-fa fa-plus-circle',
// 增加菜单点击事件

handler : function() {
addResourceWin.setTitle('新增子分类');
addResourceWin.setIconCls('icon-addchild');
addResourceWin.animateTarget = "addchild-node";
addResourceWin.show();

}

}