把一个对象的所有属性依次循环出来
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title>JavaScript 对象</title>
<link rel="stylesheet" href="">
</head>
<body>
<script type="text/javascript">
var person = {
name:‘xiaoxiao‘,
age:20,
city:‘jiangsu‘
};
for(var key in person){
if (person.hasOwnProperty(key)) {
alert(key);
}
}
</script>
</body>
</html>本文出自 “素颜” 博客，请务必保留此出处http://suyanzhu.blog.51cto.com/8050189/1902688
原文：http://suyanzhu.blog.51cto.com/8050189/1902688