body
{ 
    background-image: url(Images/background.jpg);
    margin-top: 0px;
    margin-left:auto;
    margin-right:auto;
    font-family:宋体;
    font-size:12px;
    list-style-position:inside;
    /*color:White;*/
    width: 1003px;
 }
 
.navdiv
{
    width:1003px;
    height:450px;
    float:left;
}
.bottomdiv
{
    width:1003px;
    float:left;
}
img
{
    border-width:0px;
}
.bodydiv
{
    width: 1003px;
    position: static;
    margin-top: 0px;
}
.navpart
{
    height:450px;
    width:1003px;
    float:left;
}
A
{
    color: navy;
    text-decoration: none;
}
A:hover
{
    color: firebrick;
    text-decoration: underline;
}