i have css:

#tabdiv {
margin: 10px;
border: 1px solid #fff;
padding: 10px;
-moz-border-radius: 10px;
-webkit-border-radius: 10px;
border-radius: 10px;
}
#tabdiv .item{
float: left;
border: 1px solid #fff;
padding: 10px;
width: 200px;
height: 100px;
}

and
<div id="tabdiv">...