<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>小火箭发射</title> <style type="text/css"> *{ margin: 0px; padding: 0px; } .big{ width: 500px; height: 600px; border: 1px solid #16283B; float: left; position: relative; background-color: #16283B; } .btm{ height: 40px; width: 100px; background-color: royalblue; cursor: pointer; border: 1px solid blue; float: left; position: relative; top: 560px; left: 40px; } .btm span{ line-height: 40px; width: 100px; display: block; text-align: center; } .bt_stop{ height: 40px; width: 100px; background-color: royalblue; cursor: pointer; border: 1px solid blue; float: left; position: relative; top: 500px; left: -60px; } .bt_stop span{ line-height: 40px; width: 100px; display: block; text-align: center; } .rocket{ position: absolute; bottom: 18px; left: 180px; } </style> <script type="text/javascript"> // alert("is work!"); //任务1 火箭起飞 //任务2 火箭悬停 var start; function $(id) { return document.getElementById(id); } function fly() { start=self.setInterval("fly_do()",10); } function start_send() { alert('start'); fly(); } function stop() { //alert('stop'); window.clearInterval(start); } function getBottom(rocket) { var bottomf = rocket.style.bottom; bottomf = parseInt(bottomf); if (!bottomf){ bottomf=18; } bottomf++; return bottomf; } function fly_do() { //alert("this is fly"); //通过不断改变rocket里面的css属性bottom //获取rocket对象 var rocket=$("yingshanhao"); var bottomf=getBottom(rocket); //改变属性 rocket.style.bottom=bottomf+"px"; //慢慢飞起来 //js的时间函数 } </script> </head> <body> <div> <div> <img src="https://www.jb51.net/images/rocket1.jpg" > </div> </div> <div> <span>悬停按钮</span> </div> <div> <span>发射按钮</span> </div> </div> </body> </html>
感兴趣的朋友可以使用在线HTML/CSS/JavaScript代码运行工具：测试一下运行效果。
更多关于JavaScript相关内容感兴趣的读者可查看本站专题：《JavaScript运动效果与技巧汇总》、《JavaScript切换特效与技巧总结》、《JavaScript查找算法技巧总结》、《JavaScript动画特效与技巧汇总》、《JavaScript错误与调试技巧总结》、《JavaScript数据结构与算法技巧总结》、《JavaScript遍历算法与技巧总结》及《JavaScript数学运算用法总结》