horizontallly center table who's position is relative (width is responsive)

Question

This is my HTML:

<div id='footer'>
    <table id='headerBar'>
        <tr>
        <td class='headerBarActualTd'><a href='/' class='headerBarIconLink'></a><a href='/' id='homeIcon'></a></td>
        <td class='headerBarSpacingTd'></td>
        <td class='headerBarActualTd'><a href='/username/' class='headerBarIconLink'></a><a href='/uesrname/' id='myProfileIcon'></a></td>
        <td class='headerBarSpacingTd'></td>
        <td class='headerBarActualTd'><a href='/settings/settingsPage/' class='headerBarIconLink'></a><a href='/' id='settingsIcon'></a></td>
        </tr>
    </table>
</div>

and this is my CSS:

#footer table {
    position: fixed;
    bottom: 0px;
    margin: 0px auto;
}

#headerBar {
    border-collapse: separate;
    margin: 0px auto;
    width: 100%;
    max-width: 1080px;
    padding-left: 3px;
    padding-right: 2px;
}
#headerBar .headerBarActualTd {
    text-align: center;
    vertical-align: middle;
    width: 33%;
    position: relative;
    border: 1px solid black; 
    border-radius: 3px;
    padding: 2px;
}

#headerBar .headerBarSpacingTd {
    padding: 10px;
}
.headerBarIconLink {
    top: 0;
    left: 0;
    position: absolute;
    width: 100%;
    height: 100%;
}

.headerBarIconLink:hover {
    border: 1px solid #5f9f9f; 
    border-radius: 3px;
    z-index: 1;
}

I want to horizontally center my table while it is position (fixed) at the bottom of the screen. I've read a lot of posts (like this CSS horizontal centering of a fixed div? )

where the solution involves making the margin-left half of the width, however, I do not know the width since my width will be responsive and will depend on the users screen. Is there a way to make the table horizontally centered without knowing the exact width?

Here is a fiddle: http://jsfiddle.net/p3W4s/

(if you increase the screen of the actual fiddle, you'll see that the table is not aligned in the center).

Answer 1

make the whole width 100%, and put your table inside with margin: 0 auto, will align everything center. and just change the yellow background to transparent.

http://jsfiddle.net/yUNuV/

html
css

.fixed {
width:100%;
height:40px;
background:yellow;
position:fixed;
bottom:0;
}
.center {
margin:0 auto;
width: 50%;
height:inherit;
background:red;
}