CompareValidator1.aspx font size:
View Sample
<%@ Page clienttarget=downlevel %>

<html>
<head>
<title>CompareValidator Example</title>
<link rel="stylesheet" href="/shared/netdemos.css">

<script language="C#" runat="server">
void ValidateBtnClick ( object src, EventArgs e ) {
   if ( Page.IsValid ) {
      lblmsg.Text = "Comparison is valid!";
   }
   else {
      lblmsg.Text = "Comparison is not valid!";
   }
}

void lstOperator_SelectedIndexChanged ( object src, EventArgs e ) {
   comp1.Operator= ( ValidationCompareOperator ) lstOperator.SelectedIndex;
   comp1.Validate ( );
}
</script>
</head>

<body>
<!-- #include virtual="~/shared/top.inc -->
<div class="header"><h2>CompareValidator Example</h2></div>

<!-- #include virtual="~/shared/viewsrc_top.inc" -->
<hr size=1 width=92%>

<div align="center">
<form runat="server">

<p>Type a value in each textbox, select a comparison operator, then click "Validate" to test.</p>

<table bgcolor="#eeeeee" cellpadding=10>
<tr valign="top">
   <td><h5>String 1:</h5>
      <asp:textbox selected id="txtComp" runat="server"></asp:textbox>
      <br>
      <asp:requiredfieldvalidator
         controltovalidate="txtComp"
         errormessage="Field cannot be blank" runat="server" />
   </td>
   <td><h5>Comparison Operator:</h5>
   <asp:listbox id="lstOperator" onSelectedIndexChanged="lstOperator_SelectedIndexChanged" runat="server">
      <asp:listitem selected value="Equal">Equal</asp:listitem>
      <asp:listitem value="NotEqual">NotEqual</asp:listitem>
      <asp:listitem value="GreaterThan">GreaterThan</asp:listitem>
      <asp:listitem value="GreaterThanEqual">GreaterThanEqual</asp:listitem>
      <asp:listitem value="LessThan">LessThan</asp:listitem>
      <asp:listitem value="LessThanEqual">LessThanEqual</asp:listitem>
   </asp:listbox></td>
   <td>
      <h5>String 2:</h5>
      <asp:textbox id="txtCompTo" runat="server"></asp:textbox>
      <br>
      <asp:requiredfieldvalidator
         controltovalidate="txtCompTo"
         errormessage="Field cannot be blank" runat="server" />
   </td></tr>
</table>

<br>

<asp:button runat="server"
   text="Validate" onClick="ValidateBtnClick" />

<br>

<asp:comparevalidator id="comp1"
   controltovalidate="txtComp"
   controltocompare="txtCompTo"
   type="String" runat="server" />

<br>

<asp:label id="lblmsg" runat="server" />

</form>
</div>

<hr size=1 width=92%>
<!-- #include virtual="~/shared/viewsrc.inc" -->

</body>
</html>