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<html>
<head>
<title>英文字母大小写转换</title>
</head>
<body>
<script language="javascript">
<!--
str = "JavaScript";
str1 = str.toLowerCase();
str2 = str.toUpperCase();
document.write("str=" + str + "<br>");
document.write("小写:" + str1 + "<br>");
document.write("大写:" + str2 + "<br>");
//-->
</script>
</body>
</html>
CSS代码...
JS代码...
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