function switchContent()
{
    document.getElementById('textOnly').innerHTML = "";
    
    if(document.getElementById('phContent3') != null) {
    var x = document.getElementById('phContent3');
    var y = document.getElementById('emptyContent');
    var t = x.innerHTML;
    var q = y.innerHTML;
    x.innerHTML = q;
    y.innerHTML = t;
    }
}

function accessibility()
{
    imageCollection();
}

function imageCollection()
{
    x = document.getElementsByTagName("IMG");
    var imgLength = x.length
    for (var i=0; i<imgLength; i++)
    {	
	    var textVersion = document.createElement('H4')
	    var parent = x.item(0).parentNode;
	    if (x.item(0).alt == "" ) {
		    textVersion.innerHTML = "[Graphic: No Alt Tag Provided]";
	    }
	    else {
		    textVersion.innerHTML = "[Graphic: " + x.item(0).alt + "]";
	    }
	    parent.replaceChild(textVersion, x.item(0));
    }
}

function setActiveStyleSheet(title) {
    var i, a, main;
    for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
        if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title")) {
             a.disabled = true;
      if(a.getAttribute("title") == title) a.disabled = false;
    }
  }
  
}

function getActiveStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title") && !a.disabled) return a.getAttribute("title");
  }
  return null;
}

function getPreferredStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
        return a.getAttribute("title");
  }
  return null;
}

function createCookie(name,value,days) {
  if (days) {
    var date = new Date();
    date.setTime(date.getTime()+(days*24*60*60*1000));
    var expires = "; expires="+DateTime.Now.AddYears(-30);
  }
  else expires = "";
  document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
  var nameEQ = name + "=";
  var ca = document.cookie.split(';');
  for(var i=0;i < ca.length;i++) {
    var c = ca[i];
    while (c.charAt(0)==' ') c = c.substring(1,c.length);
    if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
  }
  return null;
}

window.onload = function(e) {
  var cookie = readCookie("style");
  var title = cookie ? cookie : getPreferredStyleSheet();
  setActiveStyleSheet(title);
  if(title == 'text'){
  accessibility();
  switchContent();
  }
}

window.onunload = function(e) {
  var title = getActiveStyleSheet();
  createCookie("style", title, "");
}

var cookie = readCookie("style");
var title = cookie ? cookie : getPreferredStyleSheet();
setActiveStyleSheet(title);