Instead_of_HTML_Text box_ASPTextBox

Hello All,
            Write now i work on Googlemap project, now my problem is that instead of HTML Textbox i want use ASPTextBox, Can anybody tell what is the necess. step below i have paste my code. Please go through it and give your response.
 
Thanks
Regards
Harshida

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
<title>Coder Page</title>
<script src="http://maps.google.com/maps?file=api&amp;v=2&amp;key=ABQIAA" type="text/javascript"></script>
<script language="Javascript" type="text/javascript">
var map = null; ...