本文實例講述了Javascript中For In語句用法。分享給大家供大家參考。具體如下：
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>For In 語句</title>
<script type="text/javascript">
function Student(name, age) {
this.name = name;
this.age = age;
}
var stu = new Student("內馬爾", 20);
//遍歷對象
for (var s in stu) {
alert(s + ":" + stu[s]);
}
//遍歷數組
var myArr = [1, 3, 5, 7, 9];
for (var i in myArr) {
alert(i + ":" + myArr[i]);
}
</script>
</head>
<body>
</body>
</html>
希望本文所述對大家的javascript程序設計有所幫助。