JQuery操作Table元素

<table border="0" cellpadding="3" cellspacing="1">
    <tr>
        <td>&nbsp;&nbsp;&nbsp;&nbsp;</td>
        <td align="right">
            <input id="divEditCourses_btnUp" type="button" class="ButtonCss" 
            onclick="CourseListMove(‘up‘)" runat="server" meta:resourcekey="divEditCourses_btnUp" />&nbsp;
            <input id="divEditCourses_btnDown" type="button" class="ButtonCss" 
            runat="server" onclick="CourseListMove(‘down‘)" meta:resourcekey="divEditCourses_btnDown" />&nbsp;
            <input id="divEditCourses_Remove" type="button" class="ButtonCss" runat="server"
            onclick="CourseListRemove()" meta:resourcekey="divEditCourses_btnRemove" />
        </td>
    </tr>
    <tr>
        <td>&nbsp;&nbsp;&nbsp;&nbsp;</td>
        <td>
        <asp:GridView ID="divEditCourses_gvCourseList" runat="server" AutoGenerateColumns="false"
            DataKeyNames="TrainingScheduleID" CssClass="t1">
            <Columns>
                <asp:TemplateField ItemStyle-Width="60px" ItemStyle-HorizontalAlign="Center">
                    <HeaderTemplate>
                        <input type="checkbox" id="chkAll" onclick="CheckAllClick(this)" />
                    </HeaderTemplate>
                    <ItemTemplate>
                        <input type="checkbox" onclick="CheckItemClick()" id="chkItem_<%# Container.DataItemIndex%>"
                        trainplanid=‘<%# Eval("TrainPlanID") %>‘ rowid=‘<%# Container.DataItemIndex%>‘
                        courseid=‘<%# Eval("CourseID") %>‘ trainingscheduleid=‘<%# Eval("TrainingScheduleID") %>‘
                        orderindex=‘<%# Eval("OrderIndex") %>‘ />
                    </ItemTemplate>
                    <AlternatingItemTemplate>
                        <input type="checkbox" onclick="CheckItemClick()" id="chkItem_<%# Container.DataItemIndex%>"
                            trainplanid=‘<%# Eval("TrainPlanID") %>‘ rowid=‘<%# Container.DataItemIndex%>‘
                            courseid=‘<%# Eval("CourseID") %>‘ trainingscheduleid=‘<%# Eval("TrainingScheduleID") %>‘
                            orderindex=‘<%# Eval("OrderIndex") %>‘ />
                    </AlternatingItemTemplate>
                </asp:TemplateField>
                <asp:BoundField DataField="CourseName" HeaderText="Course Name" ItemStyle-Width="400px" />
                <asp:CheckBoxField DataField="IsMadantory" HeaderText="Is Madantory" ItemStyle-Width="100px"
                    ItemStyle-HorizontalAlign="Center" />
                <asp:BoundField DataField="Trainer" HeaderText="Trainer" ItemStyle-Width="300px" />
                <asp:CommandField ShowEditButton="True" HeaderText="Edit" ItemStyle-HorizontalAlign="Center"
                    ItemStyle-Width="100px" />
            </Columns>
        </asp:GridView>
        </td>
    </tr>
</table>

<script language="javascript" type="text/javascript">
    function CheckAllClick(curr) {
        //这里选择包含trainplanid并且id不等于chkAll的元素
        $(":checkbox[trainplanid]:not(input[id=‘chkAll‘])").attr(‘checked‘, curr.checked == true);
    }
    //若所有tbody中的项都选中了,自动将表头中的chkAll选中. 
    function CheckItemClick() {
        //获取所有选中的checkbox元素
        var expression1 = $("#<%=divEditCourses_gvCourseList.ClientID %> > tbody > tr > td > input:checkbox:checked");
        //获取所有checkbox元素
        var expression2 = $("#<%=divEditCourses_gvCourseList.ClientID %> > tbody > tr > td > input:checkbox");
        var hasChecked = $(expression1).length == $(expression2).length;
        $("#chkAll").attr("checked", hasChecked);
    }

    //根据commandName把Table行向上或向下移动
    function CourseListMove(commandName) {
        var selecterTrs = $(‘#<%=divEditCourses_gvCourseList.ClientID %> > tbody > tr > td > input:checkbox[trainplanid]:checked‘);
        if (selecterTrs.length == 0) {
            alert(‘<%= GetLocalResourceObject("Js_SelectARecordTip").ToString() %>‘);
            return false;
        }
        for (var i = 0; i < selecterTrs.length; i++) {
            var row = $(‘#‘ + selecterTrs[i].id).parents("tr:first");
            if (commandName == "up") {
                row.insertBefore(row.prev());
            } else {
                row.insertAfter(row.next());
            }
        }
    }
    //如果都没有选择就移除所有,若选择了记录，就移除选择的记录
    function CourseListRemove() {
        var selecterTrs = $(‘#<%=divEditCourses_gvCourseList.ClientID %> > tbody > tr > td > input:checkbox[trainplanid]:checked‘);
        if (selecterTrs.length > 0) {
            for (var i = 0; i < selecterTrs.length; i++) {
                $(‘#‘ + selecterTrs[i].id).parents("tr:first").remove();
            }
        }
        else {
            $("#<%=divEditCourses_gvCourseList.ClientID %> tr:not(:first)").remove();
        }
    } 
</script>