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;
        }
    }