Assign JavaScript values to C# Variable

I have a Javascript function that pulls down variables, like so:

   function OnClientCloseSecure(oWnd, args) {
       var arg = args.get_argument();

       if (arg) {
           var ResultCode = arg.ResultCode;
           var PONumber = arg.PONumber;
       }
   }

I need to assign ResultCode and PONumber to a variable in C# or if that isn’t possible a label in c#.

Are any of these options possible? If so, how would I go about doing that? I’ve tried several things with no luck. Thanks!

Answers:

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Method 1

One way would be to create hidden value and set the runat attribute to server. you can get the
value.

    <script type="text/javascript">
   function abc() 
    { 
      var str="value"; 
      document.getElementById("Hidden1").value=str; 
    } 

    </script> 

<input id="Hidden1" type="hidden" runat="server" />

Code Behind:

    string value = Hidden1.Value;

Method 2

JavaScript

<script type="text/javascript">
    function OnClientCloseSecure(oWnd, args) {
        var arg = args.get_argument();
        if (arg) {
            var ResultCode = arg.ResultCode;
            var PONumber = arg.PONumber;
            document.getElementById('<%=lbl.ClientID %>').innerHTML = ResultCode;
        }
    }

</script>

Mark Up

<asp:Label ID="lbl" runat="server" ></asp:Label>

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