css问题
css代码:#zt1 {
position:relative;
top:9px;
width:950px;
height:auto;
z-index:1;
margin:auto;
}
#zt1left {
position:relative;
float:left;
width:215px;
height:auto;
z-index:1;
overflow:hidden;
}
#zt1mid {
position:relative;
float:left;
margin-left:5px;
width:510px;
height:auto;
z-index:1;
overflow: hidden;
}
#zt1right {
position:relative;
float:left;
margin-left:5px;
width:215px;
height:auto;
z-index:1;
overflow:hidden;
} 麻烦看一下我的css有问题吗怎么不能三个并列啊第三个怎么跑到第二个下面去了