<!DOCTYPE?HTML>
<html>
<head>
<meta?http-equiv="Content-Type"?content="text/html;?charset=utf-8"?/>
<title>switch</title>
<script?type="text/JavaScript">
function?day(){
var?myweek?=prompt("what?day?is?it?today?","1");
switch(myweek)
{
?case?1:
?case?2:
?document.write("學習理念知識");
?break;
?case?3:
?case?4:
?document.write("到企業實踐");
?break;
?case?5:
?document.write("總結經驗");
?break;
?case?6:
?case?7:
?document.write("周六、日休息和娛樂");
?break;
default:alert("input?error!");}
}
</script>
</head>
<body>
<input?type="button"?value="click?here!"?onClick="day()">
</body>
</html>
2015-08-14
這里接收到的值是字符串，下面匹配的卻是整型，2種解決方法。
一，直接把接收到的值強制轉換為數字類型，如：
var?myweek?=parseInt(prompt("what?day?is?it?today?","1"));二，把下面所有case語句后面的值改為字符串，即加引號，如：
switch(myweek) ????{ ????????case?"1": ????????case?"2": ????????????document.write("學習理念知識"); ????????????break; ????????case?"3": ????????case?"4": ????????????document.write("到企業實踐"); ????????????break; ????????case?"5": ????????????document.write("總結經驗"); ????????????break; ????????case?"6": ????????case?"7": ????????????document.write("周六、日休息和娛樂"); ????????????break; ????????default:alert("input?error!");} }2016-01-28
這樣也可以
2015-08-14
var?myweek?=prompt("what?day?is?it?today?","1");
你的myweek獲取到的是一個字符串，把所有case都改成字符串
<!DOCTYPE?HTML> <html> <head> <meta?http-equiv="Content-Type"?content="text/html;?charset=utf-8"?/> <title>switch</title> <script?type="text/JavaScript"> function?day(){ var?myweek?=prompt("what?day?is?it?today?","1"); switch(myweek) { ?case?"1": ?case?"2": ?document.write("學習理念知識"); ?break; ?case?"3": ?case?"4": ?document.write("到企業實踐"); ?break; ?case?"5": ?document.write("總結經驗"); ?break; ?case?"6": ?case?"7": ?document.write("周六、日休息和娛樂"); ?break; default:alert("input?error!");} } </script> </head> <body> <input?type="button"?value="click?here!"?onClick="day()"></body> </html>