Validate CheckBox selection from multiple CheckBoxes using jQuery

Hi nedash,

I have created a sample which full fill your requirement

HTML

<div>
    Please Select at least one CheckBox?
    <br />
    <asp:CheckBox ID="chkBox1" Text="CheckBox1" class="chBox" Value="1" runat="server" />
    <br />
    <asp:CheckBox ID="chkBox2" Text="CheckBox2" class="chBox" Value="2" runat="server" />
    <br />
    <asp:CheckBox ID="chkBox3" Text="CheckBox3" class="chBox" Value="3" runat="server" />
    <br />
    <asp:CheckBox ID="chkBox4" Text="CheckBox4" class="chBox" Value="4" runat="server" />
    <br />
    <asp:CheckBox ID="chkBox5" Text="CheckBox5" class="chBox" Value="5" runat="server" />
    <br />
    <asp:CheckBox ID="chkBox6" Text="CheckBox6" class="chBox" Value="6" runat="server" />
    <br />
    <asp:CheckBox ID="chkBox7" Text="CheckBox7" class="chBox" Value="7" runat="server" />
    <br />
    <asp:CheckBox ID="chkBox8" Text="CheckBox8" class="chBox" Value="8" runat="server" />
    <br />
    <asp:CheckBox ID="chkBox9" Text="CheckBox9" class="chBox" Value="9" runat="server" />
    <br />
    <asp:CheckBox ID="chkBox10" Text="CheckBox10" class="chBox" Value="10" runat="server" />
    <hr />
    <asp:Button ID="Button1" Text="Submit" runat="server" />
</div>
<div>
    <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
    <script type="text/javascript">
        $(function () {
            $("[id*=Button1]").click(function () {
                if ($('.chBox  :checked').length < 1) {
                    alert('Please Select atleast one CheckBox');
                    return false;
                }
                return false;
            });
        });
    </script>
</div>

ScreenShot

You can try below code:

<asp:checkboxlist id="CheckBoxList1" runat="server">
<asp:ListItem>a</asp:ListItem>
<asp:ListItem>b</asp:ListItem>
<asp:ListItem>c</asp:ListItem>
</asp:checkboxlist>
<asp:button id="Button1" runat="server" text="Button" onclientclick="return ValidateCheckBoxList()" />

<script>
    function ValidateCheckBoxList() {
        var listItems = document.getElementById("CheckBoxList1").getElementsByTagName("input");
        var itemcount = listItems.length;
        var iCount = 0;
        var isItemSelected = false;
        for (iCount = 0; iCount < itemcount; iCount++) {
            if (listItems[iCount].checked) {
                isItemSelected = true;
                break;
            }
        }
        if (!isItemSelected) {
            alert("Please select an Item.");
        }
        else {
            return true;
        }
        return false;
    }
</script>

Hope it helps you.