You could create a blank hidden form field and get the javascript to
populate its value before postback, e.g:

   <form id="form1" runat="server">
       <asp:HiddenField ID="HiddenField1" runat="server" />
       <input type="submit" name="submit" value="GO" />
       <br />
       <asp:Literal ID="litResult" runat="server"></asp:Literal></form>
   <script language="javascript" type="text/javascript">
   <!--
       document.form1.HiddenField1.value='Your value';
   //-->
   </script>

In the code behind file:

   Protected Sub Page_Load(ByVal sender As Object, ByVal e As
System.EventArgs) Handles Me.Load
       If Page.IsPostBack = True Then
           litResult.Text = HiddenField1.Value
       End If
   End Sub

Michael,

You can use one of the register script methods, there are more in the Page
class. Have a look at this.

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/html/frlr
fsystemwebuipageclassregisterclientscriptblocktopic.asp

I hope this helps,

Cor