body  {
    margin: 0;
    padding: 0;
    background-image: url('images/london.png');
    background-repeat: no-repeat;
    background-attachment: fixed;
    background-position: center bottom;
    font-family: Helvetica;
}

#main {
    width: 300px;
	margin: 100px auto 0 auto;
	text-align: center;
}

#main img {
	width: 100%;
}