http://jsfiddle.net/huAxS/2/

.container {
    -moz-column-count: 2;
    -moz-column-gap: 10px;
    -webkit-column-count: 2;
    -webkit-column-gap: 10px;
    column-count: 2;
    column-gap: 10px;
    width: 360px;
}

.container div {
    display: inline-block;
    width: 100%;
    background-color: red;
}​

没有css3的支持,你不得不诉诸于js不幸.