#main_block{width:1000px;margin:auto;}
#top_block{ width:1000px; float:left; background:url(../images/tile.gif) repeat-x; padding-bottom:10px;}
#sub_block{width:1000px;margin:auto;}
#content_block{ width:940px; margin-left:20px; display:inline; float:left;}
#center_block{ width:620px; float:left;}
#right_block{ width:300px; float:right;} 
#sub_block2{width:1000px; background:#555555; margin:10px auto 0 auto; padding:4px;}