ソースはこんな感じになってます

<%@ Page Language="C#" Inherits="System.Web.UI.MobileControls.MobilePage" Culture="ja-JP" Debug="false" UICulture="ja-JP" EnableSessionState="True" Trace="false" %>
<%@ Register TagPrefix="mobile" Namespace="System.Web.UI.MobileControls" Assembly="System.Web.Mobile" %>

<script runat="server">


</script>

<html xmlns="http://www.w3.org/1999/xhtml"; >
<body>
<mobile:form id="form1" runat="server">1<br /><mobile:Link ID="Link1" Runat="server" NavigateUrl="#Form2">Link</mobile:Link></mobile:form>
<mobile:Form ID="Form2" Runat="server">2<mobile:Link ID="Link2" Runat="server" NavigateUrl="#form1">Link</mobile:Link></mobile:Form>
</body>
</html>