BootStrap select2 动态改变值的方法

　　var temp=JSON.stringify({ id: "1|所有停车场", name: "所有停车场" });

　　$("#e_pid").attr("value", tempP);

　　$("#e_pid").select2({

　　placeholder: "查找停车场名称(多选)",

　　language: "zh-CN",

　　minimumInputLength: 1,

　　allowClear: true,

　　multiple: true,

　　ajax: {

　　// instead of writing the function to execute the request we use Select2's convenient helper

　　url: "/manage/park/index/json/index",

　　dataType: 'json',

　　data: function (term, page) {

　　return {

　　parkName: term,// search term

　　powerpid: "1"

　　};

　　},

　　results: function (data, page) { // parse the results into the format expected by Select2.

　　// since we are using custom formatting functions we do not need to alter remote JSON data

　　for (var i = 0; i < data.length; i++) {

　　data[i].id = data[i].id+"|"+data[i].name;

　　};

　　data.push({ id: "577cb125f8d2c404572413d1|无", name: "无" });

　　return {

　　results: data

　　};

　　}

　　},

　　initSelection: function (element, callback) {

　　//赋初始值

　　// the input tag has a value attribute preloaded that points to a preselected movie's id

　　// this function resolves that id attribute to an object that select2 can render

　　// using its formatResult renderer - that way the movie name is shown preselected

　　var data = [];

　　var value = ""

　　var str = $(element).val().split('^');

　　for (var i = 0; i < str.length; i++) {

　　var temp = JSON.parse(str[i]);

　　value += temp.id + ",";

　　data.push(temp);

　　}

　　;

　　value = value.substring(0, value.length - 1);

　　$(element).val(value);

　　callback(data);

　　},

　　formatSelection: function (item) {

　　return item.name;//注意此处的name，要和ajax返回数组的键值一样

　　}, // 选择结果中的显示

　　formatResult: function (item) {

　　return item.name;//注意此处的name

　　},// 搜索列表中的显示

　　dropdownCssClass: "bigdrop", // apply css that makes the dropdown taller

　　escapeMarkup: function (m) {

　　return m;

　　}

　　});