麻烦老师帮忙检查一下，谢谢

来源：3-4 编程练习

胜己

2020-02-15 00:41:52

<!DOCTYPE html>
<html>
    <head lang="en">
        <meta charset="UTF-8">
        <title>onload</title>
        <script type="text/javascript">
            //补充代码
            window.onload = function(){
                var btn = document.getElementsByTagName("input")[0];
                btn.onmousedown = function() {
                    this.style.color = "red";
                }
                btn.onmousemove = function() {
                    this.style.color = "gray";
                }
            }
        </script>
    </head>
    <body>
        <input type="button" value="点击改变按钮字体颜色" >
    </body>
</html>

写回答

1回答