Regular Expression Validator for Url Address ~ Aspdotnet Studio

<%@ Page Language="C#" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><script runat="server"> protected void Button1_Click(object sender, EventArgs e) { Label1.Text = "Your Home Page:<br/ >" + TextBox1.Text.ToString(); }</script><html xmlns="http://www.w3.org/1999/xhtml"><head id="Head1" runat="server"> <title>asp.net RegularExpressionValidator example: how to validate URL</title></head><body> <form id="form1" runat="server"> <div> <h2>RegularExpressionValidator: Internet URL</h2> <asp:Label ID="Label1" runat="server" Font-Bold="true" Font-Italic="true" Font-Size="Large" ForeColor="black" > </asp:Label> <br /><br /> <asp:Label ID="Label2" runat="server" Text="Home Page" Font-Bold="true" ForeColor="Teal" > </asp:Label>        <asp:TextBox ID="TextBox1" runat="server" BackColor="Teal" ForeColor="white" Width="250" > </asp:TextBox> <asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ControlToValidate="TextBox1" Text="*" > </asp:RequiredFieldValidator> <asp:RegularExpressionValidator ID="RegularExpressionValidator1" runat="server" ValidationExpression="http(s)?://([\w-]+\.)+[\w-]+(/[\w- ./?%&=]*)?" ControlToValidate="TextBox1" ErrorMessage="Input valid Internet URL!" ></asp:RegularExpressionValidator> <br /><br /> <asp:Button ID="Button1" runat="server" Text="Submit URL" Font-Bold="true" OnClick="Button1_Click" /> </div> </form></body></html>