.a {
	border-width: 0 0 0 0;
	width: 95%;
	position: absolute;
	top: 25px;
	left: 5%;}

.b {
	border-width: 0 0 0 0;
	width: 25%;
	position: fixed;
	top: 175px;
	left: 5%;}

.c {
	border-width: 0 0 0 0;
	width: 45%;
	position: absolute;
	top: 175px;
	left: 35%;}

.d {
	border-width: 0 0 0 0;
	width: 15%;
	position: absolute;
	top: 175px;
	left: 85%;}