CSS3 box-sizing

css3 box-sizing属性box-sizing属性可以为三个值之一：content-box（default），border-box，padding-box。content-box，border和padding不计算入width之内padding-box，padding计算入width内border-box，border和padding计算入width之内，其实就是怪异模式了~ie8+浏览器支持content-box和border-box；ff则支持全部三个值。使用时：-webkit-box-sizing: 100px; // for ios-safari, android-moz-box-sizing:100px; //for ffbox-sizing:100px; //for other


<style type="text/css">
.content-box{
box-sizing:content-box;
-moz-box-sizing:content-box;
width: 100px;
height: 100px;
padding: 20px;
border: 5px solid #E6A43F;
background: blue;
}
.padding-box{
box-sizing:padding-box;
-moz-box-sizing:padding-box;
width: 100px;
height: 100px;
padding: 20px;
border: 5px solid #186645;
background: red;
}
.border-box{
box-sizing:border-box;
-moz-box-sizing:border-box;
width: 100px;
height: 100px;
padding: 20px;
border: 5px solid #3DA3EF;
background: yellow;
}
</style>