<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>今天星期几</title>
</head>
<body>
<script>
//方案一
/*var str="";
var week = new Date().getDay();
if(week==0){
str+='今天是星期日';
}
else if(week==1){
str+='今天是星期一';
}
else if(week==2){
str+='今天是星期二';
}
else if(week==3){
str+='今天是星期三';
}
else if(week==4){
str+='今天是星期四';
}
else if(week==5){
str+='今天是星期五';
}
else if(week==6){
str+='今天是星期六';
}
alert(str);*/
//方案2
/*var str='今天是星期';
var week = new Date().getDay();
switch(week){
case 0:
str+='日';
break;
case 1:
str+='一';
break;
case 2:
str+='二';
break;
case 3:
str+='三';
break;
case 4:
str+='四';
break;
case 5:
str+='五';
break;
case 6:
str+='六';
break;
}
alert(str);*/
//方案三
/*var a = new Array('日','一','二','三','四','五','六');
var week = new Date().getDay();
var str = "今天是星期" + a[week];
alert(str);*/
//方案四
var str = '今天是星期' + '日一二三四五六'.charAt(new Date().getDay());
alert(str)
</script>
</body>
</html>
