EXTJS3.0 表单元素TextField datefield 设置只读并改背景颜色为灰色

{
                fieldLabel: '纳税人名称',
                name: 'fxZgYqjnBg.nsrmc',
                readOnly:true,
                style:'background:#EEE',
                maxLength: 128
            }, {
                fieldLabel: '申请日期',
                name: 'fxZgYqjnBg.sqrq',
                xtype: 'datefield',
                format: 'Y-m-d',
                style:'background:#EEE',
                readOnly:true
                
            }