请老师检查代码

来源：4-9 编程练习

xcn_aaaa

2022-07-11 15:40:23

<!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.querySelector('input');
                console.log(btn);
                btn.onclick = function(){
                    this.style.color = 'red';
                    console.log(11);
                }
                btn.onmouseleave = function(){
                    this.style.color = 'grey';
                }
            }
        </script>
    </head>
    <body>
        <input type="button" value="点击改变按钮字体颜色" >
    </body>
</html>

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