#container {
text-align: justify;
}
#container > div {
width: 100px; /* Declare your value. Can be in relative units. */
height: 100px;
display: inline-block;
vertical-align: top;
border: 1px black solid;
/* IE fix. */
*display: inline;
zoom: 1;
}
#container:after {
content: "";
width: 100%;
display: inline-block;
}