.sf_blog_extra2 {
    float: left;
    height: 100px;
    width: 136px;
    border-right: solid 4px #fff;
    background-image: url(images/bridge_for_blog_1.jpg);
    background-repeat: no-repeat;
 }

 .sf_blog_extra4 {
    height: 20px;
    width: 970px;
    border-top: 3px solid #fff;
    border-bottom: 2px solid  #CCCCCC;
    background-image: url(images/Span_4_for_blog_1.jpg);
    background-repeat: repeat-x;
 }