What's the Proper way to achieve 3-Column layout with fluid center

Question

I am working on a 3-column layout with two fixed-width sidebars (left and right) and a fluid center. I have followed A List Apart\'s Holy Grail article, and, although this works

Answer 1

The absolute positioning works for a full width page but what about when you have a fixed width that is centered. Came up with a solution based on flex-box that works in IE8+. The flexie polyfill is used for older browsers

See http://jsfiddle.net/lorantd/9GFwT/10/

    
    

    

    




#header {
    background-color: #9B9EA7;
    height: 70px;
}

body {
    min-width: 500px;
    max-width: 630px;
    margin-right: auto;
    margin-left: auto;
    display: block;
}

#main {
    display: -moz-box;         /* OLD - Firefox 19- (buggy but mostly works) */
    display: -ms-flexbox;      /* TWEENER - IE 10 */
    display: -webkit-flex;     /* NEW - Chrome */
    display: flex;             /* NEW, Spec - Opera 12.1, Firefox 20+ */
    display:-webkit-box; /* Safari and Chrome */
    display:box;
    width: 100%;
}

#menu {
    background-color: #D42108;
    width: 120px;
    margin-top: 10px;
    margin-right: 10px;
}

#content {
    background-color: #FFD700;
    height: 500px;
    margin-top: 10px;
    margin-right: 10px;
    -webkit-box-flex: 2;      /* OLD - iOS 6-, Safari 3.1-6 */
    -moz-box-flex: 2;         /* OLD - Firefox 19- */
    width: 60%;               /* For old syntax, otherwise collapses. */
    -webkit-flex: 2;          /* Chrome */
    -ms-flex: 2;              /* IE 10 */
    flex: 2;   
}

#summary {
    width: 30px;
    margin-top: 10px;
    background-color: #9B9EA7;
}

#footer {
    background-color: #353535;
    width: 100%;
    height: 50px;
    margin-top: 10px;
    clear: both;
}