#site_center {text-align:center;}
#main {width:850px; 
margin:0 auto; text-align:left;
}

#header {height:279px;}

.col_1, .col_2, .col_3, .column1, .column2, .column3 { float:left;}

/*======= index.html =======*/
#page1 #content .col_1 {width:250px;}
#page1 #content .col_2 { width:520px;}

/*=========================*/

#footer {height:70px;}