how to check and uncheck all asp.net checkbox on single checkbox check?

how to check and uncheck all asp.net checkbox on single checkbox check ?

I have 5 asp.net checkbox on webform i want when 1 single checkbox checked then all checkbox will be cc开发者_运维知识库hecked and if checkbox is unchecked then all checkb ox will be unchecked ..

a little code snippet :

 <asp:CheckBoxList ID="chkStatu" runat="server" RepeatDirection="Horizontal">
        </asp:CheckBoxList>
        <hr />
        <asp:CheckBox ID="chkAll" runat="server" onclick="javascript:SelectAllCheckboxes(this,'chkStatu');"
            Text="SelectAll" />

and js

 function SelectAllCheckboxes(spanChk,str)
    {
        // Added as ASPX uses SPAN for checkbox
        var oItem = spanChk.children;
        var theBox=(spanChk.type=="checkbox")?spanChk:spanChk.children.item[0];
        var control;

        xState=theBox.checked;
        elm=theBox.form.elements;

        for(i=0;i<elm.length;i++)
            if(elm[i].type=="checkbox" && elm[i].id!=theBox.id)
            {
            control =elm[i].id.indexOf(str);
            if(elm[i].checked!=xState && control != -1)
             {
                elm[i].click();
             }
            }
    }

'Check or UnCheck all the checkboxes based on header checkbox and change row color 
Protected Sub ckHeader_CheckedChanged(ByVal sender As Object, ByVal e As System.EventArgs)
    Dim chHeader As CheckBox
    Dim chSelect As CheckBox
    Dim cHeader As Boolean
    Dim count As Integer
    Dim gvr As DataGridItem
    count = -1
    Try
        chHeader = CType(CMSgrid.Controls(0).Controls(1).FindControl("ckHeader"), CheckBox)
        cHeader = chHeader.Checked
        For Each gvr In CMSgrid.Items
            count = count + 1
            chSelect = CType(gvr.FindControl("ckSelect"), CheckBox)
            If (cHeader = True) Then
                gvr.BackColor = Color.Gold
                gvr.ForeColor = Color.Black
                chSelect.Checked = True
            Else
                If (count Mod 2) = 0 Then
                    gvr.BackColor = Color.LightGoldenrodYellow
                    gvr.ForeColor = Color.Black
                Else
                    gvr.BackColor = Color.PaleGoldenrod
                    gvr.ForeColor = Color.Black
                End If
                chSelect.Checked = False
            End If
        Next
    Catch ex As Exception
        UserMsgBox(ex.Message)
        WriteToLog(ex.Message)
    End Try
End Sub

Where chHeader indicates the main checkbox.

By inspecting the above code, hopefully you can understand how to make it.