ExtJS2.2 form表单提交时不提交emptyText

form.submit({
submitEmptyText: false,//添加这条就不会提交emptyText
success: function(form, action) {
Ext.Msg.alert('保存成功', action.result.msg);
addwin.destroy();
gridStore.load( {params : {
flag : 'list',
start : 0,
limit : PAGESIZE
}});
},
failure: function(form, action) {
Ext.Msg.alert('操作失败', action.result.msg);

}
});