Show confirmation Before deleting items from gridview

<asp:LinkButton runat="server" ID="myLinkButton" OnClientClick="return confirm('Are you sure you wish to continue?');" Text="Click Here" PostBackUrl="http://www.somesite.com/somelink.html" ></asp:LinkButton>

<script type="text/javascript">

    function doConfirm() {

        // do some stuff here first, e.g. form validation

        return confirm('Are you sure you wish to continue?');

    }

</script>

<asp:LinkButton runat="server" ID="myLinkButton" OnClientClick="return doConfirm();" Text="Click Here" PostBackUrl="http://www.somesite.com/somelink.html" ></asp:LinkButton>