// JavaScript Document
function hidePage(pagename) {
if(pagename.length < 1) { return; }
document.getElementById(pagename).style.display = "none";
}
function showPage(pagename) {
if(pagename.length < 1) { return; }
document.getElementById(pagename).style.display = "block";
}
function reversePageDisplay(pagename) {
if(pagename.length < 1) { return; }
if(document.getElementById(pagename).style.display == "none") { 
document.getElementById(pagename).style.display = "block"; }
else { 
document.getElementById(pagename).style.display = "none"; }
}