#site_center {text-align:center;}
#main {width:900px; margin:0 auto; text-align:left; 
}

#header {height:305px;}

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

#content .col_1 {width:640px;}
#content .col_2 { width:254px;}

p{
text-indent: 15px;
margin:10px 0;
}