бредущий по жизни (svoysredychuzih) wrote in webdev,
бредущий по жизни

Event on closing browser window

I am working on a web site (ASP.NET, FW4) which has a secure section (login required).
I would like to clear the session variables when customer closes the browser.
To achieve that I have placed a hidden button on the MasterPage (have tested, it works) and then trying to call the ASP method using JavaScript.
    <script type="text/javascript">
      window.onbeforeunload = function()
      function CustomLogoff()
         var button1 = document.getElementById('<%=hiddenLogoutButton.ClientID %>');
    <asp:Button runat="server" ID="hiddenLogoutButton" 
         Text="Invisible Logout Button" Visible="false" 
         onclick="hiddenLogoutButton_Click" />

(Also tried to put this call into body tag: <body onbeforeunload='CustomLogoff()'>)

CustomLogoff is not being called. Thought when calling it like this:

<input type="buton" onClick="CustomLogoff()" value="logoff">

It works fine (on button click of course).

Is there a way to make it work on browser closing too?

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