前端第四次实验
body {
margin: 0;
padding: 0;
}
.web {
width: 1000px;
height: 2000px;
background-color: #CCCCCC;
margin: 0 auto;
}
/* 对联广告样式 */
#ad1, #ad2 {
position: fixed;
top: 5px;
width: 100px;
height: 280px;
background-image: url(img/ad1.jpg);
background-size: contain;
}
/* 靠左 */
#ad ...
前端第三次作业
input {
font-size: 26px;
margin-top: 20px;
}
body {
background-image: url(img/grassland.png);
background-size: contain;
}
#mytank {
position: relative;
left: 10px;
top: 100px
}
let tank = document.getElementById('mytank');
//坦克开始位置
let tankLeft = 10;
let tankTop = 100;
//禁用鼠标右键
document.oncontextmenu = new Function("event.retur ...