.b1, .b2, .b3, .b4{font-size:1px; overflow:hidden; display:block;}
.b1 {height:1px; background:#E3E3E3; margin:0 5px;}
.b2 {height:1px; background:#FFFFFF; border-right:2px solid #E3E3E3; border-left:2px solid #E3E3E3; margin:0 3px;}
.b3 {height:1px; background:#FFFFFF; border-right:1px solid #E3E3E3; border-left:1px solid #E3E3E3; margin:0 2px;}
.b4 {height:2px; background:#FFFFFF; border-right:1px solid #E3E3E3; border-left:1px solid #E3E3E3; margin:0 1px;}
.contentb {background: #FFFFFF; border-right:1px solid #E3E3E3; border-left:1px solid #E3E3E3;}
.contentb div {padding-top: 3px; padding-bottom: 3px;}