#main {margin:0 auto; width:766px; text-align:left;}

#header, #content, #footer {width:100%}

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

.width {width:100%}

.col_1{width:246px; height:412px}
.col_2{width:249px; height:412px}
.col_3{width:253px; height:412px}