#main {margin:10px auto; width:900px; text-align:left;background:#fff;border: 5px solid #ddd;}

#header, #content, #footer {width:900px}

.col_1, .col_2, .col_3, .col_box_1, .col_box_2{ float:left;}


#content .col_1{width:333px;}
#content .col_2{ padding-left: 50px;}