#site_nav_under {
display: none;
}
.c_ad_block, .ad_text_commentbox {
display: none;
margin: 0;
padding: 0;
}
#ad_under_google {
height: 0;
overflow: hidden;
}
#ad_under_google a {
display: none;
}原文：http://www.cnblogs.com/ninan1024/p/7657308.html