#a{
width: 200px;
height: 100px;
background-color: red;
}
.b{
width: 200px;
height: 100px;
background-color: green;
}
.div1{
width: 200px;
height: 100px;
background-color:aqua;
}
</style>
Box" name="ckb2" / disabled="disabled">
Box" name="ckb1" disabled="disabled"/>