html,body {
    height:100%;
   overflow:qhidden;
}
*{margin:0;padding:0}
li,input,button{height:35px;}

#content{
height:80%;
margin-top:100px;
margin-left:100px;
width:60%;
}
#box{


 height:100%;
 bottom:35px;
text-align:center;

border:1px solid red;
 overflow:scroll;
}
li{
border:1px solid red;
margin-top:10px;
}
#header {
   width:200px;
    height:100px;
position:fixed;
top:0;

    background:#FeE4B5;
}
#footer{
    clear:left;    /* 防止float:left对footer的影响 */
    width:380px;
    height:80px;
position:fixed;
bottom:0;
right:0;
    background:#FFE4B5;
}