Float width issue

by dennismadsen

HTML

<br/>
<br/>
<div id="container">
    <div id="boxContainer">
        <div id="box1">
            <span>Text1</span>
        </div>
        <div id="box2">
            <span>Text2</span>
        </div>
        <div style="clear:both;"></div>
    </div>
</div>

CSS

#container {
    width:100%;
    background-color:yellow
}

#boxContainer {
    margin: 0px auto;
    background-color:black;
}

#box1 {
    float: left;
    background-color:blue
}

#box2 {
    float: left;
    background-color:red
}