.courseimg {
	margin-top: 10px;
	margin-bottom: 10px;
}
.course1 {
	line-height: 20px;
	float: left;
	width: 795px;
	margin-top: 10px;
	margin-bottom: 10px;
}

.course1 a {
	float: right;

}
.course1l {
	float: left;
	height: 191px;
	width: 480px;
	margin-right: 20px;
}
#exercise {
	clear: both;
	float: left;
	height: 721px;
	width: 786px;
	margin-top: 10px;
	margin-bottom: 10px;
}

img.na1 {
	clear: both;
	float: left;
	height: 15px;
	width: 84px;
	margin-top: 55px;
	margin-left: 250px;
}

img.na2 {
	clear: both;
	float: left;
	height: 15px;
	width: 84px;
	margin-top: 235px;
	margin-left: 220px;
}

img.na3 {
	clear: both;
	float: left;
	height: 15px;
	width: 84px;
	margin-top: 235px;
	margin-left: 400px;
}