CSS submit button - inline težava

button	{
    float: left;
    background-color: #f5f5f5;
    border: 1px solid #dedede;

    font-family: Myriad, Verdana, Arial;
    font-weight: bold;
    color: #565656;
	padding: 2px 7px 2px 5px;
}

button:hover	{
    background-color: #dff4ff;
    border: 1px solid #c2e1ef;
    color: #336699;
}

<form id="login" action="#" method="post">
<input name="pass" id="username" type="text" value="Username" class="userbar" />
<input name="pass" id="pass" type="password" value="Password" class="userbar" />
<button type="submit" name="login"><img src="img/user_add.png" />Login</button>
</form>