ASP.NET

<br />
public class Clients : IDisposable<br />
{<br />
<br />
   private SqlConnection _Connection = null;<br />
<br />
   public Clients()<br />
   {<br />
      _Connection = new SqlConnection("ConnectionString") // ConnectionString is a setting ofcourse!<br />
   }<br />
<br />
   public DataTable GetAllClients()<br />
   {<br />
       // Code to return all your clients<br />
   }<br />
<br />
   public DataRow GetClient(int ClientID)<br />
   {<br />
       // Code to return a single client<br />
   }<br />
<br />
   public int CreateClient(string Name)<br />
   {<br />
       // Code to create a client<br />
   }<br />
<br />
   public bool UpdateClient(int ClientID, string Newname)<br />
   {<br />
      // Code to update your client<br />
   }<br />
<br />
   public bool RemoveClient(int ClientId)<br />
   {<br />
      // Code to remove the client<br />
   }<br />
<br />
   public void Dispose()<br />
   {<br />
      if (_Connection != null)<br />
         _Connection.Dispose();<br />
      _Connection = null;<br />
   }<br />
}<br />
<br />

Dim jsScript As String
jsScript = "jsVar = '" & VBVar & "';"
Dim cs As ClientScriptManager = Page.ClientScript
If (Not cs.IsStartupScriptRegistered("InitJSVar")) Then
   cs.RegisterStartupScript(Page.GetType(), "InitJSVar", jsScript, True)
End If

you can use server-side hidden field to communicate between client-side and server-side.

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



In Form_load

<br />
protected void Page_Load(object sender, EventArgs e)<br />
    {<br />
        Hidden1.Value = "13";<br />
    }

You can set like that..

In Client-side ~

<script language="javascript" type="text/javascript"><br />
      function getvalue(){<br />
        var var1 = document.getElementById('Hidden1').value;<br />
        //do something.<br />
      }<br />
    </script><br />

Thanks and Regards,
Michael Sync ( Blog: http://michaelsync.net)

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ClientScript.RegisterStartupScript(this.GetType(), "HideAddress", "<script>HidePreviousAddressSection()</script>");<br />
ClientScript.RegisterStartupScript(this.GetType(), "HideControl", "<script>HideControl()</script>");