#videoBox {
	display: none;
	font-family:Arial;
	font-size:0.9em;
	margin-left: 60px;
	margin-right: auto;
	margin-top: 10px;
    z-index: 100;
 }
#videoPhysicist {
	display: none;
	font-family:Arial;
	font-size:0.9em;
	margin-left: 60px;
	margin-right: auto;
	margin-top: 10px;
    z-index: 100;
 }
#videoWelcome {
	display: none;
	font-family:Arial;
	font-size:0.9em;
	margin-left: 60px;
	margin-right: auto;
	margin-top: 10px;
    z-index: 100;
 }
#videoStudent {
	display: none;
	font-family:Arial;
	font-size:0.9em;
	margin-left: 60px;
	margin-right: auto;
	margin-top: 10px;
    z-index: 100;
 }
#videoVisitor {
	display: none;
	font-family:Arial;
	font-size:0.9em;
	margin-left: 60px;
	margin-right: auto;
	margin-top: 10px;
    z-index: 100;
 }
#videoEducator {
	display: none;
	font-family:Arial;
	font-size:0.9em;
	margin-left: 60px;
	margin-right: auto;
	margin-top: 10px;
    z-index: 100;
 }