效果：
代码：
<!DOCTYPE html>
<html lang="en"><head><meta charset="UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>自动提示消息</title></head><style>.notification {position: fixed;top: 5%;left: 2%;padding: 15px;background-color: #f0f0f0;color: #333;border: 1px solid #ccc;border-radius: 5px;box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);z-index: 9999;opacity: 1;transition: opacity 0.3s ease-in-out;}.notification:hover {opacity: 0.8;}</style><script>//按钮1function showinfo1(){showNotification('我是第一条提示', 2000)}//按钮2function showinfo2(){showNotification('我是第二条提示', 2000)}//提示信息function showNotification(message, duration) {var notification = document.createElement('div');notification.className = 'notification';notification.textContent = message;document.body.appendChild(notification);setTimeout(function () {notification.style.opacity = 0;setTimeout(function () {document.body.removeChild(notification);}, 1000);}, duration);}</script><body><button onclick="showinfo1()">点我出现提示1</button><button onclick="showinfo2()">点我出现提示2</button></body>
</html>
