Atributo do título HTML
/*Title popup*/
<body>
<p title="Popup here">hover me!</p>
</body>
/*Tab title*/
<head>
<title>This is the tab title</title>
</head>
AthBar
/*Title popup*/
<body>
<p title="Popup here">hover me!</p>
</body>
/*Tab title*/
<head>
<title>This is the tab title</title>
</head><title>This is the title</title>