hello friends This is to add javascript for Textbox in Tabcontainer <%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="cc1" %> <form id="form1" runat="server"> <%@ page language="VB" autoeventwireup="false" codefile="Default.aspx.vb" inherits="_Default" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN""http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <head runat="server"> <title>Untitled Page</title> <script language="javascript" type="text/javascript"> function Callme() { document.getElementById("TabContainer1_TabPanel1_TextBox2").value=document.getElementById("TabContainer1_TabPanel1_TextBox1").value } </script> </head> <body> <asp:scriptmanager id="ScriptManager1" runat="server...