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複製代碼 代碼如下:
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
<script type="text/javascript">
/*
* 用.為對象添加屬性
用關鍵字delete刪除屬性
用[]添加屬性
和.的不同
r.name==r["name"];
r.name只能添加字串屬性
[]添加屬性，功能強大，可以動態添加屬性
*/
var r=new Object();
alert(typeof(r));
//添加屬性
r.name="jobs";
alert(r.name);
r.getname=function(){
return "jobs";
}
alert(r.getname());
//刪除屬性
delete r.name;
alert(r.name);//這時候的結果就是undefined
//--------------------------------------------
//使用中括弧為對象添加屬性
r["name"]="tom";
alert(r["name"]);
r.name="toms";
alert(r["names"]);
//r.name==r["name"]//這兩種寫法是等價的哦
var arg="abc";
r[arg]="heima";//功能強大，可以動態添加屬性，可以使一個函數變數返回的一個字串
r.arg="itcast";//arg預設為字串
</script>
</head>
<body>
</body>
</html>
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