首先是css

开门大吉

改只需其中的gif

  <html><head><style>section{width: 361px;height: 247px;border: red 1px solid;margin: 100px auto;background:url(erha.gif);position: relative;}.l,.r{position: absolute;top:0;width:50%;height:100%;background-color: red;transition:all 1s;}.l{left:0;border:1px solid #000;transform-origin: left;}.r{right:0;border:1px solid #000;transform-origin: right;}section:hover .l{transform: rotateY(-130deg);}section:hover .r{transform: rotateY(-130deg);}</style></head><body><section><div class="l"></div><div class="r"></div></section></body>
</html>

轮播样式

<html><style>ul{list-style:none;}div{width: 318px;height: 500px;border: 1px solid #ccc;margin: 50px auto;padding: 5px auto;position: relative;}.l{position:absolute;top: %50;margin-top: -250px;left:0;}.r{position:absolute;top: %50;margin-top: -250px;right:0;}.circle{width:65px;height: 13px;background-color:;position:absolute;margin-top: -14px;left: 50%;margin-left: -55px;}.circle li{width:9px;height: 9px;background-color: #B7B7B7;float: right;margin: 2px;border-radius: 50%;background: rgba(0,0,0,0.5);}.circle .current{background-color: #f40;}</style>
<body><div><img src="2.jpg" height="500" ><img src="left.png" width="40" height="40" class="l" ><img src="right.png" width="30" height="40" class="r"><ul class="circle"><li class="current"></li><li></li><li></li><li></li><li></li><ul></div>
</body>
</html>

随便找的图

js

账户密码获取

<html><title>show</title>
<body><form method="get" action="xxx.php"><input type="txt" name="username" value=""><input type="password" name="word" value=""><input type="submit" name="sub" ></form>
</body>
</html>

xxx.php

<?phpecho '<pre>';var_dump($_REQUEST);

回车发送命令（按键）

<html>
<head>
<meta charset="utf8">
<style>
#count{width:200px;height:100px;border:black solid 1px;
}
</style>
<link rel="stylesheet" href="css/bootstrap.css">
<script src="js/jquery-3.4.1.js"></script>
<script src="js/bootstrap.js"></script>
</head><body>
<div>
<input type="button" id="btn" value="点我">
<input type="text" id="txt" value=""></div>
<div id="count"></div><script>document.onkeydown = function(e){if(e.keyCode==13){count.innerHTML = txt.value;}}btn.onclick = function(){count.innerHTML = txt.value;}</script>
</body></html>

计时器

<html>
<head>
<meta charset="utf8">
<style>
#count{width:200px;height:100px;border:black solid 1px;
}
</style>
<link rel="stylesheet" href="css/bootstrap.css">
</head><body>
<div>
<input type="button" id="btn" value="点我">
</div>
<div id="count"><span><span>
</div><script>var a=document.getElementById('btn');var b=document.getElementById('count');var timer =null;var count=0;b.innerHTML=count;timer = function tip(){count++;b.innerHTML=count;}a.onclick=function(){setInterval(timer,1000);}</script>
</body><script src="js/jquery-3.4.1.js"></script>
<script src="js/bootstrap.js"></script>
</html>

通过按钮实现清屏

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script>
window.onload=function(){
document.getElementById("btn").onclick=function(){displayDate()};function displayDate(){
txt.value="我喜欢你";
}
}</script>
</head>
<body>
<input id="txt" value="">
<button id="btn">清屏</button></body>
</html>

选项卡（轮播图原型）

<html>
<head>
<meta charset="utf8">
<style>
#div1 div{
width:200px;
height:200px;
border:black solid 2px;
display: none;
}#div1 .active{
background:red;
}
</style>
<link rel="stylesheet" href="css/bootstrap.css">
</head><body>
<div id="div1"><input id="btn1" class="active" type="button" value="农药资讯"><input id="btn2" type="button" value="前方消息"><input id="btn3" type="button" value="最新报道"><input id="btn4" type="button" value="聊天"><div style="display:block;">21123</div><div >321231</div><div >231321</div><div>54654321</div></div    ><script>var oDiv=document.getElementById("div1");var aBtn=div1.getElementsByTagName("input");var aDiv=div1.getElementsByTagName("div");for(var i=0;i<aBtn.length;i++){   aBtn[i].index=i;aBtn[i].onclick=function(){   for(var i=0;i<aBtn.length;i++){aBtn[i].className="none";aDiv[i].style.display="none";}this.className="active";aDiv[this.index].style.display='block';}}</script>
</body><script src="js/jquery-3.4.1.js"></script>
<script src="js/bootstrap.js"></script></body>
</html>

阶乘

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script>
//点击btn触发函数事件
window.onload=function()
{
document.getElementById("btn").onclick=function(){add()    }
};//定义一个阶乘的函数
function add()
{var i,j=1;for(i=1;i<=txt.value;i++){j=j*i;}txt1.value=j;
}</script>
</head>
<body>
<input id="txt" value="">
<button id="btn">的阶乘是</button>
<input id="txt1" value=""></body>
</html>

密码一致登录

<html><body><input type="password" id="password" name="password" value="登 录"/>
加个按钮
<input name="a" type="submit" value="登 录" onclick="checkpassword();"/></body>
<script>function checkpassword(){var pwd="1234567";//你和朋友约定的密码，写死的var inpwd=document.getElementById("password").value;//获取输入的代码if(pwd == inpwd){ //判断一下是否一样window.location.href="img1.html";}
}
alert(inpwd);
</script></html>

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