1#header
 2{...}{
 3    width:900px;
 4    height:100px;    
 5}
 6
 7#logo
 8{...}{
 9    width:200px;
10    height:100%;
11    background-color:#00EE76;
12    float:left;
13}
14
15#top_ad
16{...}{
17    width:695px;
18    height:100%;
19    background-color:#00E5EE;
20    float:right;
21}
22
23
24#nav_wrap
25{...}{
26    width:900px;
27    height:20px;
28    margin-top:5px;
29    background-color:#00CD00;    
30}
31
32#nav_menu
33{...}{
34    width:120px;
35    height:100%;
36    font-size:20px;
37    text-align:center;
38    float:left;    
39}