Edit in JSFiddle

$(function () {
    $('button').on('click', function () {
        $('.box1').animate({
            left: '+=100px'
        }, 2000);
        $('.box2').animate({
            left: '+=100px'
        }, 2000);
    });
});

<div class="test">
    <button>go</button>
    <div class="box1 box">
        <h1>lalalalalla</h1>
    </div>
    <div class="box2 box">
        <h1>hahahahahha</h1>
    </div>
    <p class="info">start...</p>
</div>

* {
    margin: 0;
    padding: 0;
}
body {
    font: 12px/1.5 arail;
}
ul {
    list-style: none;
}
button {
    height: 2em;
    font-size: 14px;
    width: 4em;
    background: orange;
    color: #fff;
    border-radius: 3px;
    cursor: pointer;
    margin-bottom: 10px;
    border: 1px solid #eee;
}
.box {
    position: absolute;
    border: 1px solid orange;
    height: 40px;
    line-height: 40px;
    width: 160px;
    background: #eee;
    text-align: center;
}
.box2 {
    top: 120px;
}