<!DOCTYPE HTML><html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>switch</title><script type="text/JavaScript">function liang(){var myweek =document.getElementById("bian").value;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"); break; case 6: case 7: document.write("周六、日休息和娱乐"); break; default: document.write("输入出错");}}</script></head><body><input id="bian" type="text" name="grade" ><br><input type="button" value="点吧" onclick="liang()"></body></html>为什么框里写什么，都是显示错误。
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Perona
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从页面获取的都是字符串，2种解决方法：
把case后的值加上引号，变成字符串型，如：
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>switch</title>
<script type="text/JavaScript">
function liang()
{
var myweek =document.getElementById("bian").value;
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");
break;
case '6':
case '7':
document.write("周六、日休息和娱乐");
break;
default:
document.write("输入出错");
}
}
</script>
</head>
<body>
<input id="bian" type="text" name="grade" ><br>
<input type="button" value="点吧" onclick="liang()">
</body>
</html>2.把获取的值转换成整型，如：
var myweek =parseInt(document.getElementById("bian").value);
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