div/CSS question regarding width and padding

div#header
{
    width: 100%;
    background-color: #252525;
    padding: 10px 0px 10px 15px;
    position: relative;
}

div#login
{
    float: right;
    position: absolute;
    right: 10px;
    top: 5px;
}

<div id="header">
    <img src="./img/logo.jpg" />
    <div id="login">
        <form id="header-login" action="#">
            <input type="text" /> <input type="text" /> <input type="submit" value="LOGIN" />
        </form>
    </div>
</div>

div#header { width: 100%; height:15px; background-color: #252525; padding: 10px 0px 10px; position: relative; }