.bgImg{
margin:auto;
position: fixed/absolute/relative;
z-index: 20000001;
left:0;
right: 0;
top:0;
bottom: 0;
width: 400px;
}
标签：上下左右 居中 dex relative idt absolute index position body
.bgImg{
margin:auto;
position: fixed/absolute/relative;
z-index: 20000001;
left:0;
right: 0;
top:0;
bottom: 0;
width: 400px;
}
标签：上下左右 居中 dex relative idt absolute index position body
原文地址：http://www.cnblogs.com/miaSlady/p/8046789.html
