目录
1.创建
常用：var person={}；
日期对象：var d=new Date();
2.定时器
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<script type="text/javascript">
var i=0;
window.onload=function(){
var oBtn=document.getElementById("btn");
oBtn.onclick=function(){//点击后显示
var timer=setInterval(function(){//匿名函数
document.write(i++ +"<br />");
if (i==5){
clearInterval(timer);
}
},1000);//函数，毫秒数
}
}
</script>
</head>
<body>
<input type="button" id="btn" value="按钮" >
</body>
</html>