body {
    background: rgba(0,0.8);
    font-family: sans-serif;
    font-size: 11px;
    color: #e0e0e0;
}

#wrapper {

}

#login {
    margin-left: auto;
    margin-right: auto;
    margin-top: 50px;
    background: rgba(0,0.9);
    width: 360px;
    padding: 20px;
    position: relative;

    -webkit-border-radius: 15px;
    border-radius: 15px;
}


#registercontainer {
    position: relative;
    margin-left: auto;
    margin-right: auto;
    width: 1050px;
}

#register {
    position: absolute;
    left: 740px;
    top: 50px;
}

//

<div id="wrapper">
        <div id="login">
            <h2>Login to The Something Project</h2>
            <form action="game" method="post">
                <input type="text" name="username" maxlength="20" placeholder="username"><br>
                <input type="text" name="usericon" placeholder="http://imgur.com/icon.png"><br>
                <br>
                <input type="submit" value="login">
            </form>
        </div>


        <div id="registercontainer">
            <div id="register">
                <h2>Register for The Something Project</h2>
            </div>
        </div>
    </div>

我想在居中的div旁边有一个div(见上图),但我得到的却是这个. http://i.imgur.com/X0e4s.png

我该如何解决这个问题？

问候