<!DOCTYPE html>
<html>
<head>
<script type="text/javascript">
document.documentElement.style.fontSize=document.documentElement.clientWidth/6.4+‘px‘;
document.documentElement.style.fontSize=document.documentElement.clientWidth/6.4+‘px‘;;
</script>
</head>
<body>
</body>
</html>
原文：http://www.cnblogs.com/haohaosky/p/7771413.html