test.html

<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Document</title>
</head>
<body>
	<div style="width:600px;height:600px;background-image: url(img/test.png);background-position: center center;background-size: auto 100%;"></div>
	<img src="img/test.png" alt="">
</body>
</html>
<script type="text/javascript">
localStorage.setItem("uid","99999");
	function getMyDay(date){
		var week;
		if(date.getDay()==0){
			week="周日"
		}else if(date.getDay()==1){
			week="周一"
		}else if(date.getDay()==2){
			week="周二"
		}else if(date.getDay()==3){
			week="周三"
		}else if(date.getDay()==4){
			week="周四"
		}else if(date.getDay()==5){
			week="周五"
		}else if(date.getDay()==6){
			week="周六"
		} 
		return week;
	}
	
	console.log(getMyDay(new Date("2017-08-21")))
</script>
<script type="text/javascript">
var uid = localStorage.getItem("uid");
console.log(localStorage);

</script>