.trialback {
	background-attachment: fixed;
	background-image: url(../Graphics/trial_back.jpg);
	background-repeat: no-repeat;
	background-position: center 5%;
}
.showback {
	background-attachment: fixed;
	background-image: url(../Graphics/trial_back.jpg);
	background-repeat: no-repeat;
	background-position: center 20px;
}