麻烦检查一下，谢谢

来源：2-7 编程练习

鲨鱼没有鲨鱼线

2019-10-27 22:05:23

<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title>HTML事件</title>
</head>
<body>
    <!--补充代码-->
    <button class="btn" onmousemove="move(this,'purple')" onmouseout="out(this,'gray')">开始</button>
    &nbsp;
    <button class="btn" onmousemove="move(this,'yellow')" onmouseout="out(this,'gray')">结束</button>
    <script type="text/javascript">
        //补充代码
        function move(btn,color){
            btn.style.color=color;
        }
        function out(btn,color){
            btn.style.color=color;
        }
    </script>
</body>
</html>

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