两个都选上的情况？？
出现了两个都选上的情况
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>属性选择器</title>
<link href="style.css" rel="stylesheet" type="text/css">
</head>
<body>
<form action="#">
<div class="wrapper">
<div class="box">
<input type="checkedbox" checked="checked" id="boy" name="1" /><span></span>
</div>
<label for="boy">男</label>
</div>
<div class="wrapper">
<div class="box">
<input type="checkbox" id="girl" name="1" /><span></span>
</div>
<label for="girl">女</label>
</div>
</form>
</body>
</html>
form {
border: 1px solid #ccc;
padding: 20px;
width: 300px;
margin: 30px auto;
}
.wrapper {
margin-bottom: 10px;
}
.box {
display: inline-block;
width: 30px;
height: 30px;
margin-right: 10px;
position: relative;
background: orange;
vertical-align: middle;
border-radius: 100%;
}
.box input {
opacity: 0;
position: absolute;
top:0;
left:0;
width: 100%;
height:100%;
z-index:100;/*使input按钮在span的上一层，不加点击区域会出现不灵敏*/
}
.box span {
display: block;
width: 10px;
height: 10px;
border-radius: 100%;
position: absolute;
background: #fff;
top: 50%;
left:50%;
margin: -5px 0 0 -5px;
z-index:1;
}
input[type="radio"] + span {
opacity: 0;
}
input[type="checkbox"]:chec
