JS给HTML5页面<Select></Select>绑定选中项

获取选中值：

function setApprovalPersonName() {
            var name = $("#approvalPersion").find("option:selected").text();
            document.getElementById("approvalPersonName").value = name;
        }

刷新列表：

    $("#is_conference").children()[1].selected = true;
    $("#is_conference").selectpicker('refresh');

例1：

 //第二级案件类型发生改变
         $("#SecondCasetypelist").change(function () {
             var child = $("#SecondCasetypelist").children();
             var selecting = 0;
             for (i = 0; i < child.length; i++) {
                 if (child[i].selected) {
                     selecting += 1;
                 }
             }
             if(selecting == 0)
             {
                 child[0].selected = true;
             }
             else if(selecting > 1)
             {
                 child[0].selected = false;
             }
             loadHtml($('#tableCustom'), 'CustomReport', { Year: $("#Year").val(), Month: $("#Month").val(), caseStatus: $("#SecondCasetypelist").val(),flot:"2" });
         });

例2：

  //列出会议类型函数
     function appendStrConferenceType(source)
     {
         debugger
         var type = $('#con_category').children();
         if(source == 1)
         {
             type[0].selected = true;
         }
         else if(source == 2)
         {
             type[1].selected = true;
         }
         else
         {
             type[2].selected = true;
         }
     }