#contentHolder{position:relative; overflow:hidden; margin-left:-10px; /*margin-top:-10px;*/ width: 840px; height:400px; z-index:10;}
#upperBit {vertical-align:top; display:inline; float:left; z-index:11;}
#upperBit img, #menuHolder img {margin-right:-4px; display:inline; vertical-align:top;}
#menuHolder {margin-left:-10px; height: 110px; width: 836px;}
#menuHolder img {margin-right:-3px; display:inline; vertical-align:top;}

.medStu {display:inline; float:left; z-index:12;}
.block {display:block; }

.labelLife{position:relative; top:-130px; left:160px; width:50px; height:50px;  z-index:15;}
.labelEng{position:relative; top:-380px; left:270px; z-index:16;}
.labelNat{position:relative; top:-260px; left:190px; z-index:17;}
.labelMed{position:relative; top:-540px; left:315px; width:50px; height:50px; z-index:18;}
.labelStu{position:relative; top:-340px; left:440px; width:50px; height:50px; z-index:19;}	

.invisible{visibility:hidden;}
.visible{visibility:visible;}