i am new at asp.net; i try to add RequiredFieldValidator to phone number section, but i cant to its at visual studio 2010 because its not have "id" when i add the id inside the class, its still not showing.

Also how can i add onclick at submit button?

```
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="odevproje._Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    <fieldset>
    <div class="legend"><h3>iletişim</h3></div>
        <div class="form_row">                      
    <div class="form_property form_required">Adınız</div>
    <div class="form_value"><input type="text" size="32" name="name" value="" />                       
          </div>    
        <div class="clearer">&nbsp;</div>
        </div>
        <div class="form_row">                      
             <div class="form_property">Email</div>
           <div class="form_value"><input type="text" size="32" name="email" value="" /></div>
           <div class="clearer">&nbsp;</div>
             </div>
        <div class="form_row">                  
            <div class="form_property">Telefon</div>                                  <div class="form_value"><input type="text" size="32" name="website" value="" /></div>
            <div class="clearer">&nbsp;</div>
        </div>              
        <div class="form_row">                  
            <div class="form_property form_required">Mesaj</div>
                <div class="form_value"><textarea rows="10" cols="46" name="comment"></textarea></div>
                    <div class="clearer">&nbsp;</div>
        </div>
             <div class="form_row form_row_submit">
        <div class="form_value"><input type="submit" class="button" value="Send"/>
            <div class="clearer">&nbsp;</div>
            </div>          
       </fieldset>
    </div>
    </form>
</body>
</html>

```