Javascript confirmation dialog - ASP.NET

<asp:Button ID="btnUploadFiles" runat="server" OnClick="buttonSubmit_Click" Text="Update"  />

protected void buttonSubmit_Click(object sender, EventArgs e)
    { try{// update the database
          // change label text to tell the user update succeeded}
      catch(Exception ex){...}
    }

protected void buttonSubmit_Click(object sender, EventArgs e)
{
    try
    {
       // update the database
       // change label text to tell the user update succeeded
       label.Text = "Message";
       string js = "function hideLabel(){document.getElementById('" + label.ClientID + "').style.display = 'none'};setTimeout(hideLabel, 5000);"
       ClientScript.RegisterClientScriptBlock(this.GetType(), "test", js ,true);
    }
    catch(Exception ex){...}
}

<script type="text/javascript">
function hideLabel()
{
    // replace yourLabelID with <%=YourLabelID.ClientID%> if it's a .NET Label control
    document.getElementById('yourLabelID').style.display = 'none';
}
setTimeout('hideLabel()', 5000);
</script>

function hideLabel(label)
{
   $(label).hide();
}

$(document).ready( function() {
    var label = $('#labelID');
    setTimer(function() { hideLabel(label); ),5000);
});