关于 DIV 高度以及平铺的问题


<html>
<head>
<style type="text/css" rel="stylesheet">
body{
text-align:center;
}
#bgMain {
width: 800px;
margin:0px auto;
height:600px;
background:#ff0;
overflow:hidden;
}
.bgGrid {
    float:left;
    background: #F7F7F7;
    width:50px;height:200px;
    margin-left:50px;
    padding-top:100000px;
}
</style>
</head>
<body>
<div id="bgMain">
<div class="bgGrid"></div>
<div class="bgGrid"></div>
<div class="bgGrid"></div>
<div class="bgGrid"></div>
<div class="bgGrid"></div>
<div class="bgGrid"></div>
<div class="bgGrid"></div>
<div class="bgGrid"></div>
</div>
</body>
</html>
看一下是不是这样