/* Called whenever a page is resized */
function onResize() {
  var subtract = 50 + 30;
  var topBar = document.getElementById("optionsBarTop");
  if(topBar) subtract += 30;
  var bottomBar = document.getElementById("optionsBarBottom");
  if(bottomBar) subtract += 30;
  var cHeight = (document.body.clientHeight - subtract) + "px";
  var aHeight = (document.body.clientHeight - 50 - 30) + "px";
  var sHeight = (document.body.clientHeight - 70 - 100) + "px";
  var central = document.getElementById("central")
  if(central) central.style.height = cHeight;
  var gradientL = document.getElementById("centralBorderLeft");
  if(gradientL) gradientL.style.height = aHeight;
  var gradientR = document.getElementById("centralBorderRight");
  if(gradientR) gradientR.style.height = aHeight;
  var adminBar = document.getElementById("adminBar")
  if(adminBar) adminBar.style.height = aHeight;
  var servicesText = document.getElementById("servicesText");
  if(servicesText) servicesText.style.height = sHeight;
  var servicesTextShadow = document.getElementById("servicesTextShadow");
  if(servicesTextShadow) servicesTextShadow.style.height = sHeight;
  var overlay = document.getElementById("findOutMore");
  if(overlay) overlay.style.height = cHeight;
  var body = document.getElementById("body");
  if(body) body.style.visibility = "visible";}

/* Called when a page is first loaded */
function onLoad() { 
  return onResize(); }

/* Called when the help button is clicked */
function toggle_overlay(pageID) {
  var overlay = document.getElementById(pageID);
  if(!overlay) return false;
  var central = document.getElementById("central");
  var servicesText = document.getElementById("servicesText");
  var servicesTextS = document.getElementById("servicesTextShadow");
  if(overlay.style.visibility == "hidden") {
    if(servicesText) servicesText.style.visibility = "hidden";
    if(servicesTextS) servicesTextS.style.visibility = "hidden";
    overlay.style.visibility = "visible";
    central.style.visibility = "hidden";
  } else {  
    central.style.visibility = "visible";
    if(servicesText) servicesText.style.visibility = "visible";
    if(servicesTextS) servicesTextS.style.visibility = "visible";
    overlay.style.visibility = "hidden";
  } 
  return true;}