function toggleHideReveal(elemId) {
	
	if (document.getElementById(elemId).style.display == "block") {
		document.getElementById(elemId).style.display = "none";
	} else {
		document.getElementById(elemId).style.display = "block";
	}
}

function toggleHideArrayRevealElem(arrayId, elemId) {
	for(i=0; i<arrayId.length;i++){
		if(document.getElementById(arrayId[i]).style.display == "block"){
			document.getElementById(arrayId[i]).style.display = "none";
		}
	}
	toggleHideReveal(elemId);
}