Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

'Put user code to initialize the page here

        Button1.Attributes.Add("onclick", "DisableButtonStep1()")

End Sub

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

        System.Threading.Thread.Sleep(5000)

        Response.Write("Page has been saved.")

End Sub

          <script language="javascript">

        <!--

            function DisableButtonStep1() {

                document.forms[0].submit();

                window.setTimeout("disableButtonStep2('" + window.event.srcElement.id + "')", 0);

            }

            function disableButtonStep2(buttonID) {

                document.getElementById(buttonID).disabled=true;

            }

        //-->

          </script>