body
{
       text-align:left;
       background: #fff;
} 

#container

{
position: relative;
top: 0px　auto;
Center:0px　auto;
...

       margin:0px auto;
       width:960px;
       background:#fff;
} 


#header
{
       margin:0px auto;
       
} 

#content
{
       width:960px;
       float:Center;
       margin: 0px auto;

       background:#fff;
} 

#navigation
{
       margin:0px auto;
       width:960px;
       float:left;
background: url(bg.jpg) #ffffff;
      
}
#sidebar
{
       width:180px;
       float:left;
       margin:0px;
} 

#footer .gutter
{
       background:#ccc;
       padding:5px;
       margin: 0px auto;
} 

/*  Navigation
----------------------------------------------- */ 

ul#mainNav1
{
        margin: 0px auto;
} 

ul#mainNav1 li
{
        float:left; 
        margin:0px auto; 
        list-style:none;
} 

ul#mainNav1 li a
{
        font:bold 15px/140% 宋体;
        text-decoration: none;
        display:block;


        border-right:0px solid #004F0A;
        color:#04F0A;
} 

ul#mainNav1 li a { padding:3px 16px 3px 16px; } 

ul#mainNav1 a:hover
 {
     background:#FBFFF0;
     color:#FBFFF0;
    }

ul#mainNav1 a.current { font-weight:bold; color:#888888;}