#content #contentmain .top1
{
    height: 144px;
    background-image: url(images/cn_top1.jpg);
    background-repeat: no-repeat;
    background-position: left top;
}
#content #contentmain .top2
{
    height: 132px;
    background-image: url(images/cn_top2.jpg);
    background-repeat: no-repeat;
    background-position: left top;
}
#content #contentmain .top3
{
    height: 118px;
}
#content #contentmain .top3 img
{
    display: block;
}
#content #contentmain .top4
{
    height: 120px;
    background-image: url(images/cn_top4.jpg);
    background-repeat: no-repeat;
    background-position: left top;
}