className用法

4.className用法
例 4.1（keyIEFF.html）
<!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=utf-8"/>
    <title>
    </title>
    <script language="JavaScript" type="text/javascript">
        function calc(thistextar, Span) {
            var len = thistextar.value.length;
            Span.innerHTML = len + ' 字';
            Span.className = 'toredC';
        }
    </script>
    <style type="text/css">
        <!--
        .toredC {
            color: #FF0000;
        }
        -->
    </style>
</head>
<body><textarea cols="50" rows="3"  onKeyUp="calc(this,document.getElementById('num'))"
        ></textarea>
(<SPAN id=num>字数</SPAN>)
</body>
</html>

更多内容请见原文，文章转载自：https://blog.csdn.net/qq_43650923/article/details/102822703

posted @ 2021-11-25 18:19  malala  阅读(98)  评论(0)  编辑  收藏  举报