设计wordpress主题问题

#box  {
margin-bottom:10px;
margin-left:0;
margin-right:10px;
width:240px;
}
.left {
float:left;
margin-left:10px;
}

#wrapper{
     width:980px;
     background-color:#fff;

<div id=\"wrapper\">
<div id=\"box\" class=\"left\">
...WP tags and...
</div>
</div>

overflow: hidden

#wrapper{
    overflow: hidden;
    width:980px;
    background-color:#fff;
}