<html>
<head>
<style>
html {height:100%;}
body {height:100%;}
img.normal {height:auto;}
img.big {height:50%;}
img.small {height:10%;}
</style>
</head>
<body>
<img class="normal" src="/demo/logocss.gif" width="95" height="84"><br>
<img class="big" src="/demo/logocss.gif" width="95" height="84"><br>
<img class="small" src="/demo/logocss.gif" width="95" height="84">
</body>
</html>