<!DOCTYPE html>
<html>
<head>
<style>
img.ex1
{
position:absolute;
bottom:0px;
}
img.ex2
{
position:relative;
bottom:-100px;
}
</style>
</head>
<body>
<img class="ex1" src="logocss.gif" width="95" height="84">
<h1>This is a heading</h1>
<img class="ex2" src="logocss.gif" width="95" height="84">
</body>
</html>转自：http://www.w3cschool.cc/try/try.php?filename=trycss_position_bottom