<script language="javascript"> <!-- var today=prompt("请输入具体的数字:0,1,2,3,4,5,6","indefined"); switch(today) { case "0": alert("今天是星期天!"); break; case "1": alert("今天是星期一!"); break; case "2": alert("今天是星期二!"); break; case "3": alert("今天是星期三!"); break; case "4": alert("今天是星期四!"); break; case "5": alert("今天是星期五!"); break; case "6": alert("今天是星期六!"); break; default: alert("别乱输!"); break;} --> </script>引号 还有break加上 .
改成这样 var today=prompt("请输入具体的数字:0,1,2,3,4,5,6","indefined"); switch(today) { case "0": alert("今天是星期天!");break; case "1": alert("今天是星期一!");break; case "2": alert("今天是星期二!");break; case "3": alert("今天是星期三");break; case "4": alert("今天是星期四!");break; case "5": alert("今天是星期五!");break; case "6": alert("今天是星期六");break;}
楼上都已经解决了,给个简化版。<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> <title>swtich函数的应用</title> </head><body> <script language="javascript"> <!-- today=prompt("请输入具体的数字:0,1,2,3,4,5,6","indefined"); var _date=['天','一','二','三','四','五','六']; if(!_date[today]){alert("别乱输!");} else{alert("今天是星期"+_date[today]+"!");} --> </script> </body> </html>
<script language="javascript">
<!--
var today=prompt("请输入具体的数字:0,1,2,3,4,5,6","indefined");
switch(today)
{
case "0":
alert("今天是星期天!");
break;
case "1":
alert("今天是星期一!");
break;
case "2":
alert("今天是星期二!");
break;
case "3":
alert("今天是星期三!");
break;
case "4":
alert("今天是星期四!");
break;
case "5":
alert("今天是星期五!");
break;
case "6":
alert("今天是星期六!");
break;
default:
alert("别乱输!");
break;}
-->
</script>引号 还有break加上 .
var today=prompt("请输入具体的数字:0,1,2,3,4,5,6","indefined");
switch(today)
{
case "0":
alert("今天是星期天!");break;
case "1":
alert("今天是星期一!");break;
case "2":
alert("今天是星期二!");break;
case "3":
alert("今天是星期三");break;
case "4":
alert("今天是星期四!");break;
case "5":
alert("今天是星期五!");break;
case "6":
alert("今天是星期六");break;}
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>swtich函数的应用</title>
</head><body>
<script language="javascript">
<!--
today=prompt("请输入具体的数字:0,1,2,3,4,5,6","indefined");
var _date=['天','一','二','三','四','五','六'];
if(!_date[today]){alert("别乱输!");}
else{alert("今天是星期"+_date[today]+"!");}
-->
</script>
</body>
</html>