asp. net page prevents duplicate submission of sample sharing

First put javascript code:

<script type="text/javascript">
        var clicks = 0;
        function checkclick(obj) {
            clicks = clicks + 1;
            if (clicks>1) {
                alert(" Do not click again! ");
                return false;
            }
            return true;
        }
    </script>

Here is the page implementation:

<asp:button ID="btnSubmit" runat="server" text=" The query " OnClientClick="return checkclick(this);" OnClick="btnSubmit_Click" />

After successful execution of the background method, the page refreshes and resets clicks to 0.