imagebutton3.aspx font size:
<html>
<head>
<title>Using Dynamic HTML Events with the ImageButton Control</title>
<link rel="stylesheet" href="/shared/netdemos.css">

<script language="C#" runat="server">
void saySomething ( object src, CommandEventArgs e ) {
   switch ( e.CommandName ) {
   case "earth" :
      message.InnerHtml = "You&rsquo;re probably a down-to-earth person.";
      break;
   case "venus" :
      message.InnerHtml = "Seems like you&rsquo;d rather be in fiery Venus.";
      break;
   case "neptune" :
      message.InnerHtml = "Maybe you&rsquo;re the type who&rsquo;d prefer cooler Neptune.";
      break;
   }
}
</script>
</head>

<body>
<!-- #include virtual="~/shared/top.inc -->
<div class="header"><h2>Using Dynamic HTML Events with the ImageButton Control</h2></div>

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

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

   <asp:imagebutton commandname="earth" height=100 width=100
      imageurl="~/shared/images/earth.gif"
      style="border:thick white ridge"
      onMouseOver="this.style.border='thick green groove';"
      onMouseOut="this.style.border='thick white ridge';"
      onCommand="saySomething" runat="server" />
   &nbsp;
   <asp:imagebutton commandname="venus" height=100 width=100
      imageurl="~/shared/images/venus.gif"
      style="border:thick white ridge"
      onMouseOver="this.style.border='thick green groove';"
      onMouseOut="this.style.border='thick white ridge';"
      onCommand="saySomething" runat="server" />
   &nbsp;
   <asp:imagebutton commandname="neptune" height=100 width=100
      imageurl="~/shared/images/neptune.gif"
      style="border:thick white ridge"
      onMouseOver="this.style.border='thick green groove';"
      onMouseOut="this.style.border='thick white ridge';"
      onCommand="saySomething" runat="server" />

   <p><span id="message" runat="server">Where do you want to go today?</span>
</form>
</div>

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

</body>
</html>