function doPopup(URL,w,h){
	thisWindow = window.open(URL, "popWin", "toolbar=1, scrollbars=1, location=0, statusbar=0, menubar=0, resizable=1, width=" + w + ", height= " + h);
}

function rollOverNav(x){
	if (x.className != "linkActive"){
		x.className = "linkHover";
	}
}
function rollOffNav(x){
	if (x.className != "linkActive"){
		x.className = "link";
	}
}
function highlightNav(x){
	document.getElementById(x).className = "linkActive";
}

function ShowOrHideLayer(thisLayer){
	if (document.getElementById(thisLayer).style.display == "none"){
		makeVisible(thisLayer);
	} else {
		makeInvisible(thisLayer)
	}
}
function makeVisible(thisLayer){
	document.getElementById(thisLayer).style.display = "block";
}
function makeInvisible(thisLayer){
	document.getElementById(thisLayer).style.display = "none";
}