为什么点击按钮没有反应啊？
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>switch</title>
<script type="text/JavaScript">
// var myweek =3;//myweek表示星期几变量
function a(){
var myweek=prompt("今天星期几？"，"..");
switch(myweek)
{
case "1":
case "2":
document.write("学习理念知识");
break;
case "3":
case "4":
document.write("到企业实践");
break;
case "5":
document.write("总结经验");
case "6":
case "7":
document.write("周六、日休息和娱乐");
break;
default:
alert("请问有什么问题吗？");
}
}
</script>
</head>
<body>
<input type="button" value="点击" onClick="a()">
</body>
</html>
