登录页面代码：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>登录页面</title>
</head>
<style type="text/css">
/* 父容器 */
.box {
position: relative;
width: 260px;
margin: 1px auto;
}
/* 子容器 底部对齐 */
.box .child {
display: inline-block;
vertical-align: bottom;
height:27px;
}
</style>
<body>
<div class="box">
<div class="child">
<img src="user.png" style="height: 27px;width: 27px;"/>
</div>
<div class="child">
<input type="text" id="username" value="" style="border:none !important; height: 27px; width: 158px;" placeholder="请输入用户名"/>
</div>
<hr style="background-color: #dedee2;height: 1px;border: none;">
<div class="child">
<img src="password.png" style="height: 25px;width: 25px;"/>
</div>
<div class="child">
<input type="password" id="password" value="" style="border:none !important;height: 27px;" placeholder="请输入密码" />
</div>
<div class="child">
<img src="close.png" alt="" id="eye" class="eye" />
</div>
<hr style="background-color: #dedee2;height: 1px;border: none;">
<br>
<div align="center">
<input type="button" value="登 录"
onclick="login()"
style="border:none; border-radius: 40px !important;
background-color: #2E65FE;color: #ffffff; width: 150px;height: 40px;"/>
</div>
</div>
</body>
<script>
// 1.获取元素
var eye = document.getElementById('eye');
var pwd = document.getElementById('password');
// 2.注册事件 处理程序
var flag = 0;
eye.onclick = function() {
// 点击一次之后，flag一定要变化
if (flag == 0) {
pwd.type = 'text';
eye.src = 'open.png';
flag = 1; //赋值操作
} else {
pwd.type = 'password';
eye.src = 'close.png';
flag = 0;
}
}
//登录事件
function login(){
var username = document.getElementById('username').value;
var password = document.getElementById('password').value;
alert("username："+username)
alert("password："+password)
}
</script>
</html>
效果：
参考：
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