.col1, .col2, .col3, .col4{ float:left}
/*======= width =======*/
#w{margin:0 auto; text-align:left; width:709px; clear:left; position:relative}
#distance { 
	width:1px;
	height:50%;
	margin-bottom:-100em; /* half of container's height */
	float:left;
}

/*======= header =======*/
#header_2 {margin-top:5px}
#header_2 img{float:left;}
/*======= content =======*/