EXTJS 4.2 资料 控件之 xtype: "fieldcontainer",追加html

         {
                xtype: "fieldcontainer",
                layout: "hbox",
                items: [
                {
                    fieldLabel: '素材目录',
                    name: 'Path',
                    xtype: 'textfield',
                    allowBlank: false,
                    readOnly: true,
                     300
                }, { border: false, html: "<div style='font-weight:800;color:red'>说明：这是固定目录</div>" }
                ]
            }