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大牛求教?。。。。?！

<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>switch</title>
<script type="text/JavaScript">
function a1(){
var abc=prompt("今天是星期幾","123");
switch(abc);

{
?case 1:
?case 2:
?document.write("學(xué)習(xí)理念知識(shí)");
?break;
?case 3:
?case 4:
?document.write("到企業(yè)實(shí)踐");
?break;
?case 5:
?document.write("總結(jié)經(jīng)驗(yàn)");
?case 6:
case 7:????
?
?document.write("周六、日休息和娛樂(lè)");
?break;
?default:
??? alert("輸入不對(duì)啊")；
}}
</script>
</head>
<body>
<input type="button" value="做犀利" onClick="a1()">
</body>
</html>

慕仙8528660

2015-08-06

源自：JavaScript進(jìn)階篇 4-4

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1 回答

Perona
2015-08-06

switch(abc);

這里多了分號(hào)，刪去

?case?5:
?document.write("總結(jié)經(jīng)驗(yàn)");

這里漏了break;

?alert("輸入不對(duì)啊")；

這里分號(hào)敲成了中文分號(hào)，改成英文的即可

?alert("輸入不對(duì)啊");

var?abc=prompt("今天是星期幾","123");

這里接收的是字符型，轉(zhuǎn)換一下數(shù)據(jù)類(lèi)型吧

var?abc=parseInt(prompt("今天是星期幾","123"));

修改后的代碼

<!DOCTYPE?HTML>
<html>
<head>
<meta?http-equiv="Content-Type"?content="text/html;?charset=utf-8"?/>
<title>switch</title>
<script?type="text/JavaScript">
function?a1(){
var?abc=parseInt(prompt("今天是星期幾","123"));
switch(abc)
{
?case?1:
?case?2:
?document.write("學(xué)習(xí)理念知識(shí)");
?break;
?case?3:
?case?4:
?document.write("到企業(yè)實(shí)踐");
?break;
?case?5:
?document.write("總結(jié)經(jīng)驗(yàn)");
?break;
?case?6:
?case?7:?????
?document.write("周六、日休息和娛樂(lè)");
?break;
?default:
????alert("輸入不對(duì)啊");
}}
</script>
</head>
<body>
<input?type="button"?value="做犀利"?onClick="a1()">
</body>
</html>