function hideAllMenus(d,s) {
		for (counter=1; counter<=rowcount; counter++) {
			document.getElementById(s+counter).style.display = "none";
		}
} 
function HideContent(d,s) {
		document.getElementById(d).style.display = "none";
}
function ShowContent(d,s) {
	hideAllMenus(d,s);
		document.getElementById(d).style.display = "block";
}
function ReverseContentDisplay(d,s) {
if(document.getElementById(d).style.display == "none") {
document.getElementById(d).style.display = "block";
} else {
document.getElementById(d).style.display = "none";
}
}
function HideCover(d,s) {
		document.getElementById(d).style.display = "none";
}
function ShowCover(d,s) {
		document.getElementById(d).style.display = "block";
}