You can surprising your visitors
CSS
<style type="text/css">
body {margin: 0 !important;padding: 0 !important;}
#infobar {font: message-box;}
#infobar a, #infobar a:link, #infobar a:visited, #infobar a:active
{display: block;color: #000;width:100%;
background: #FFFFE1 url(./images/warning.gif)
no-repeat fixed .3em .3em;border-bottom: .16em outset;text-decoration: none;cursor: default;}
#infobar a:hover {color: #FFF;background:
#3169B6 url(./images/warning2.gif) no-repeat fixed .3em .3em;}
#infobar p{margin:0px; padding: .45em 0em .45em 22px; font-size:11px;}
</style>
HTML
<body>
<div id="infobar"><a href="http://blogs.hzsolutions.com/register.aspx">
<p>It appears you have not yet registered with our community.
To register please click here...</p></a>
</div>
...other HTML element goes here