http://www.jqueryfuns.com/resource/view/1180
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<style>
p {
text-align: left;
background-color: #1E2021;
padding: 20px;
width: 300px;
position: absolute;
border-radius: 3px;
box-shadow: 1px 1px 1px rgba(0, 0, 0, 0.2);
right: -4px;
color: #FFF;
font-size: 13px;
line-height: 1.4;
}
p:before {
position: absolute;
content: '';
width: 0;
height: 0;
border: 6px solid transparent;
border-bottom-color: #1E2021;
right: 10px;
top: -12px;
}
</style>
<body>
<p>
This is the inline help tip! You can explain to your users what this section of your web app is about.
</p>
</body>
</html>