1#main_wrap
 2{...}{
 3    width:900px;
 4    margin-left:auto;
 5    margin-right:auto;    
 6}
 7
 8#center
 9{...}{    
10    margin-top:5px;
11    height:900px;    
12}
13
14#left_nav
15{...}{
16    width:190px;
17    height:900px;    
18    float:left;
19    padding:5px;
20    background-color:#00B2EE;
21}
22
23#userInfo
24{...}{    
25    background-color:#FF0000;
26    padding:5px;
27}
28
29#timeInfo
30{...}{    
31    background-color:#00FF00;
32    padding:5px;
33}
34
35#right_content
36{...}{
37    width:685px;
38    height:900px;    
39    float:right;
40    padding:5px;
41    background-color:#32CD32;
42}
43