30（属性和方法的删除，对象遍历）.html

<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<script type="text/javascript">
			var human = {
				name:"小明",
				age:"18",
				sex:"女",
				hobby:"游戏",
				run:function(){
					document.write("跑步");
				}
			}
			
			//属性和方法的删除
			var xiaoming = human;
//			xiaoming = null;//销毁对象

			delete xiaoming.name;//删除属性
			document.write(xiaoming.name,"<br />");
			
			
			
			delete xiaoming.run;//删除方法
			document.write(xiaoming["run"],"<br />");
			
			
			
			
//			对象的遍历
		for (a in xiaoming) {
			document.write(a+"=>"+xiaoming[a],"<br />");
		}
			
			
		
			
		
			
			
		</script>
	</head>
	<body>
	</body>
</html>