Set QueryString Parameter value in TextBox using JavaScript

HTML:

<form id="form1" runat="server">
    <div>
        <asp:Button ID="btnButton" Text="Submit" OnClientClick="return ForLabel();" runat="server" />              
        <asp:Label ID="lblName" runat="server"></asp:Label>
    </div>
    <script type="text/javascript">       
        function ForLabel() {
            var year = '<%= Request.QueryString["param1"]%>';
            document.getElementById("lblName").innerHTML = year;         
            return false;       
        }        
    </script>
    </form>