<!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>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>ToolTip en Jquery</title>
<script type="text/javascript" language="javascript" src="../jquery.js"></script>
<script type="text/javascript" language="javascript">
$(document).ready(function(){
$("*[id=tooltip]").hover(function(e){
$('body').append('<div class="estilo">'+$(this).attr('rel')+'</div>');
$('.estilo').css({top : e.pageY - 50, left : e.pageX + 20}).fadeIn("slow");
}, function(){
$('.estilo').remove();
}).mousemove(function(e){
$('.estilo').css({top : e.pageY - 50, left : e.pageX + 20});
});
});
</script>
<style type="text/css">
.estilo{
position:absolute;
display:none;
padding:10px 10px;
background:#000;
color:#FFF;
border-radius:8px;
}
</style>
</head>
<body>
<p> </p><p> </p><p> </p>
<a href="#" id="tooltip" rel="Mostrando esto" >Ejemplo</a>
</body>
</html>