var pageChangePending = false;

function MM_swapImgRestore() { //v3.0
  var i,x;

  var a=document.MM_sr; 
  for (i=0; a && i < a.length && (x=a[i]) && x.oSrc; i++) {
    x.src=x.oSrc;
  }
}

function MM_preloadImages() { //v3.0
  var d=document; 
  if (d.images) { 
    if(!d.MM_p) {
      d.MM_p=new Array();
    }

    var i,j=d.MM_p.length;
    var a=MM_preloadImages.arguments; 

    for(i=0; i<a.length; i++) {
      if (a[i].indexOf("#")!=0) { 
        d.MM_p[j]=new Image; 
        d.MM_p[j++].src=a[i];
      }
    }
  }
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x;

  var a=MM_swapImage.arguments; 

  document.MM_sr=new Array; 
  for(i=0;i<(a.length-2);i+=3) {
    if ((x=MM_findObj(a[i]))!=null) {
      document.MM_sr[j++]=x; 
      if(!x.oSrc) {
        x.oSrc=x.src;
      } 
      x.src=a[i+2];
    }
  }
}

function preloadHome() {
/*  alert("getting catalogJSON"); */

  getCatalogJSON();
  getScheduleJSON()
  preloadImages();
  gotoPageFromURL();
  /*
  setInterval(watchHash, 1000);qe
  */
}

var recentHash = "";

function gotoPageFromURL() {
  var initialPage = window.location.hash;
  
  gotoPage(initialPage);

  if (recentHash != initialPage) {
    recentHash = initialPage;
  }
}

function gotoPage(thePage) {
  if (thePage == "#schedule") {
    showSchedulePage();
  }
  else if (thePage == "#catalog") {
    showCatalogPage();
  }
  else if (thePage == "#quick-enroll") {
    showQuickEnrollPage(0, false);
  }
}

function watchHash() {
  console.log("pageChangePending = " + pageChangePending);

  if (window.location.hash == recentHash || pageChangePending) {
    return;
  }

  alert("watchHash changing window");

  recentHash = window.location.hash;
  gotoPage(recentHash);
}



function preloadImages() {
  MM_preloadImages('images/buttons_ro_01.gif',
                   'images/buttons_ro_02.gif',
                   'images/buttons_ro_03.gif',
                   'images/buttons_ro_04.gif',
                   'images/buttons_ro_08.gif',
                   'images/buttons_ro_05.gif',
                   'images/buttons_ro_06.gif',
                   'images/buttons_ro_07.gif');
}


function showStaticPage(pageName) {
  simpleOverlay = dojo.byId("overlay");
	if (simpleOverlay == null) {
		reloadHomePage();
	}
	getStaticPage(pageName);
}

function reloadHomePage() {
  var req = createXMLHttpRequest();

  req.onreadystatechange = function() {
		//		console.log(req.readyState + "   " + req.status)
    if (req.readyState == 4 && req.status == 200) {
      displayHomePage(req.responseText);
    }
  }
  req.open("GET", "/static/get_static_page?page_name=Home");
  req.send(null);
}

function displayHomePage(responseText) {
	pcDiv = dojo.byId("pageContents");
	pcDiv.innerHTML = responseText;
}

function getStaticPage(pageName) {
  var req = createXMLHttpRequest();
  req.onreadystatechange = function() {
		//		console.log(req.readyState + "   " + req.status)
    if (req.readyState == 4 && req.status == 200) {
      displayStaticPage(req.responseText);
    }
  }
  req.open("GET", "/static/get_static_page?page_name=" + pageName);
  req.send(null);
}

function displayStaticPage(responseText) {
  simpleOverlay = dojo.byId("overlay");
	simpleOverlay.style.visibility = "hidden";
	simpleOverlay.innerHTML = "hidden";

	saDiv = dojo.byId("staticOverlayDiv");
	console.log("saDiv = " + saDiv);
	saDiv.innerHTML = responseText;
	saDiv.style.visibility = "visible";
}