<!DOCTYPE html>
<html>
<head>
<style type='text/css'>
#textBoxContainer {
height: 30%;
position: fixed;
z-index: 99;
bottom: 0;
left: 0;
right: 0;
background-color: #999;
border: 4px solid #000;
}
</style>
</head>
<body>
<div id="textBoxContainer"></div>
</body>
</html>