jQuery introduction and how to use jQuery with ASP.NET Master page and simple pages

<%@ Page Title="Home Page" Language="C#" MasterPageFile="~/Site.master" AutoEventWireup="true"
    CodeFile="Default.aspx.cs" Inherits="_Default" %>

<asp:Content ID="HeaderContent" runat="server" ContentPlaceHolderID="HeadContent">
<script type="text/javascript">

    $(document).ready(function () {

//    Solution 1:
        $('input[id$=TextBox1]').keyup(function () {
            //write your code here

            var txt = $('input[id$=TextBox1]').val();
            $('input[id$=TextBox2]').val(txt);
        });


        //    Solution 2:
        var lbltext = $('#' + '<%=lbl.ClientID %>').text();

        $('#' + '<%=TextBox4.ClientID %>').val(lbltext);

    });


//    Solution 3:

    $(document).ready(function () {


        
        alert($("[id$=_TextBox6]").attr("id"));

     
    }); 
   
  
    




    

</script>


</asp:Content>
<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent">
  
  <p> Solution 1 :</p>
   <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
   <asp:TextBox ID="TextBox2" runat="server"></asp:TextBox>

  <p> Solution 2:</p> 
   <asp:Label ID="lbl" runat="server" Text="CopytoTextbox"></asp:Label>
   <asp:TextBox ID="TextBox4" runat="server"></asp:TextBox>


   <p> Solution 3 : get id of textbox6</p>
     
   <asp:TextBox ID="TextBox6" runat="server"></asp:TextBox>

   


   
</asp:Content>