JS案例：通过switch语句判断今天是星期几
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<meta charset="utf-8">
<title>switch语句应用案例</title>
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<script type="text/javascript">
var date=new Date();
document.write("今天是：");
switch(date.getDay()){
case 1:
document.write("星期一");
break;
case 2:
document.write("星期二");
break;
case 3:
document.write("星期三");
break;
case 4:
document.write("星期四");
break;
case 5:
document.write("星期五");
break;
case 6:
document.write("星期六");
break;
default:
document.write("星期日");
}
</script>
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