screen對象
screen
screen物件表示螢?zāi)坏挠嵪?，常用的屬性有?/p>
screen.width：螢?zāi)粚挾?，以像素為單位?/p>
screen.height：螢?zāi)桓叨?，以像素為單位?/p>
screen.colorDepth：傳回顏色位數(shù)，如8、16、24。
<html>
<head>
<script>
'use strict';
alert('Screen size = ' + screen.width + ' x ' + screen.height);
</script>
</head>
<body>
</body>
</html><!DOCTYPE html>
<html>
<body>
<script>
document.write("可用高度：" + screen.availHeight);
</script>
</body>
</html>
