Extjs如何能够实现在文本输入框内输入相应内容回车之后进入相应的信息查询处理(效果等同于点击查询按钮)

var form = new Ext.form.Panel({
...
items: [{
fieldLabel: 'Field 1',
name: 'field1',
allowBlank: false
},{
fieldLabel: 'Field 2',
name: 'field2',
listeners: {
specialkey: function(field, e){
// e.HOME, e.END, e.PAGE_UP, e.PAGE_DOWN,
// e.TAB, e.ESC, arrow keys: e.LEFT, e.RIGHT, e.UP, e.DOWN
if (e.getKey() == e.ENTER) {
var form = field.up('form').getForm();
form.submit();
}
}
}
}
],
...
});