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<meta charset="utf-8">
<title>W3xue教程(w3xue.com)</title>
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<p>使用 for-in 来循环对象的属性:</p>
<p id="demo"></p>
<script>
var myObj = { "name":"W3xue", "alexa":10000, "site":null };
for (x in myObj) {
document.getElementById("demo").innerHTML += x + "<br>";
}
</script>
</body>
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