body {
background-color: #363636;
color: #b3b3b3;
padding: 10px;
margin: 0;
cursor: default;
font: 12px Arial,sans-serif;
}
.img {
background-image: url(pat.png);
background-position: left bottom;
background-repeat: repeat-y;
}
<body class="img">
$(function() {
$("#home").click(function() {
$('body').toggleClass('img')
});
});