为什么这样不行？
5 回答
<!DOCTYPE HTML>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<script type="text/javascript">
window.onload = function(){
var w= document.documentElement.offsetWidth
|| document.body.offsetWidth;
var h = document.documentElement.offsetHeight
|| document.body.offsetHeight;
document.write(w+'<br/>'+h);
}
</script>
</body>
</html>这样写也可以
<!DOCTYPE HTML>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<script type="text/javascript">
window.onload = function(){
var w= document.documentElement.offsetWidth
|| document.body.offsetWidth;
var h = document.documentElement.offsetHeight
|| document.body.offsetHeight;
document.write(w+'<br/>'+h);
}
</script>
</head>
<body>
</body>
</html>
这样写
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