select2取值报错，Failed to read the 'selectionDirection' property from 'HTMLInputElement': The input element's type ('hidden') does not support selection.

用到了 select2 组件来多选收件人，用搜狗浏览器（6.2版高速模式）在执行到如下这句时报错（Uncaught InvalidStateError: Failed to read the 'selectionDirection' property from 'HTMLInputElement': The input element's type ('hidden') does not support selection.），6.3版高速和兼容模式都没问题。

var recipients = JSON.stringify($("select#recipient").select2('data'));

咋一看好像是 input[hidden] 不支持 selection，搞不明白，还是先上 stackoverflow，居然有人遇到同样的问题

http://stackoverflow.com/questions/25487927/javascript-stringify-object

解决办法：

//var recipients = JSON.stringify($("select#recipient").select2('data')); //搜狗6.2.5.21637高速模式下报错
var selectedObjects = $("select#recipient").select2('data');
var dataToSave = [];
$.each(selectedObjects, function (index, obj) {
　　dataToSave.push({ "id": obj.id, "text": obj.text });
});
var recipients = JSON.stringify(dataToSave);