body {
	margin-top: 15px;
	margin-right: auto;
	margin-left: auto;
}
.marginbottom5 {
	margin-bottom: 5px;
}
.marginbottom10 {
	margin-bottom: 10px;
}
.marginbottom15 {
	margin-bottom: 15px;
}
.marginbottom20 {
	margin-bottom: 20px;
}