var divIDs =  ["overviewContent", "HunterBio", "GatenbyBio"]; 
CTMtoggleVis('overviewContent');
function CTMtoggleVis(on) {
if (divIDs){	
    for(i in divIDs)
    {
		
        if (divIDs[i] == on)
        {
            document.getElementById(divIDs[i]).style.display = "block";
			
        }else{
            document.getElementById(divIDs[i]).style.display = "none";
        }
    }
}
}