html {
    background-color: #3f54ba;
    color: #000;
    margin: 0;
    padding: 0;
}
body {
    margin: 0 auto;
    padding: 0;
        display: block;
    width: 1004px;
        overflow: auto;
}
#header {
        width:100%;
    float: left;
    background-color: #5b5ddf;
}
#left {
    width: 200px;
    float: left;
    overflow: hidden;
    background-color: #5b5ddf;
}
#right {
    width: 200px;
    float: right;
    overflow: hidden;
    background-color: #5b5ddf;
}
#content {
    width: 604px;
    float: left;
    overflow: hidden;
    background-color: #5b5ddf;
}
#footer {
    clear: both;
    width: 100%;
    background-color: #5b5ddf;
}