当我取消选中任何复选框时，Checkall-Checkbox也应该取消选中...哪个没有发生请帮助！ [英] When I am Unchecking Any Of The Checkboxes, Checkall-Checkbox Should Also Get Uncheck ... which is not happening Please Help !!

问题描述

<script type = "text/javascript">
    function CheckAll(obj) {
        var list = document.getElementById("<%=dlStudentList.ClientID%>");
        var chklist = list.getElementsByTagName("input");
        for (var i = 0; i < chklist.length; i++) {

            if (chklist[i].type == "checkbox" && chklist[i] != obj) {

                chklist[i].checked = obj.checked;

            }

        }

    }

</script>

<asp:DataList ID="dlStudentList" RepeatColumns="4" runat="server">
    <HeaderTemplate>
         <asp:CheckBox id="ChkAll" runat="server" Text="  Select All" 
            onclick = "CheckAll(this);"/>                           
        <br />
                                     
    </HeaderTemplate>    
        <ItemTemplate>
            <label>
                <table cellpadding="0" cellspacing="0" class="cntls checkliststud" style="font-family: Verdana;
                    font-size: 10px; background-color: #f0f0f0; width: 200px; cursor: pointer">
                    <tr>                       
                        <td>                        
                            <input type="checkbox" id="chkRegno" name="chkRegno"  runat="server"  value='<%# Eval("usercode") %>'
                                onfocus="javascript:setFocus(this)" onblur="javascript:onLostFocus(this)"  önkeypress="javascript:test(event,this)" />         
                        </td>
                    </tr>
                </table>
                 
            </label>
        </ItemTemplate>
    </asp:DataList>

推荐答案

嗯，你什么都不做了



一个有点jQuery帮助的解决方案

Well, you do nothing for that

A solution with a bit help of jQuery

（function（）{

(function () {

（ ＃ChkAll ）.change（function（）{
if （

("#ChkAll").change(function () { if (

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