【align】
<!DOCTYPE html>
<html>
<head>
<style type='text/css'>
.big {
overflow: auto;
position: relative;
border: 1px solid;
}
.middle_left {
border: 1px solid;
position: absolute;
bottom: 0;
}
.middle_right {
float: right;
border: 1px solid;
line-height: 48px;
}
</style>
</head>
<body>
<div class="big">
<div class="middle_left">Small left</div>
<div class="middle_right">Big right</div>
</div>
</body>
</html>
