function ShowPrevDesc() {
	document.getElementById('prevdesc').style.zIndex = "10";
	document.getElementById('nextdesc').style.zIndex = "1";
	document.getElementById('bar').style.zIndex = "1";
}
function HidePrevDesc() {
	document.getElementById('prevdesc').style.zIndex = "1";
	document.getElementById('nextdesc').style.zIndex = "1";
	document.getElementById('bar').style.zIndex = "10";
}
function ShowNextDesc() {
	document.getElementById('prevdesc').style.zIndex = "1";
	document.getElementById('nextdesc').style.zIndex = "10";
	document.getElementById('bar').style.zIndex = "1";
}
function HideNextDesc() {
	document.getElementById('prevdesc').style.zIndex = "1";
	document.getElementById('nextdesc').style.zIndex = "1";
	document.getElementById('bar').style.zIndex = "10";
}