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++) {
    if(a.getAttribute("rel").indexOf("style") != -1
       && a.getAttribute("rel").indexOf("alt") == -1
       && a.getAttribute("title")
       ) 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="+date.toGMTString();
  }
  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("pagestyle");
  var title = cookie ? cookie : getPreferredStyleSheet();
  setActiveStyleSheet(title);
}

window.onunload = function(e) {
  var title = getActiveStyleSheet();
  createCookie("pagestyle", title, 365);
}

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

function event_promoter_banners() {
	setInterval("update()", 4000);
}

var principalSponsors = Array();
var officialPartners = Array();
var sponsors = Array();
var num1=0;
var num2=0;
var num3=0;

function update() {
	if(document.getElementById("go_elephant_principal_sponsors"))
	{
		if (principalSponsors.length>1)
		{
			display("go_elephant_principal_sponsors", principalSponsors[num1]);
			num1++;
			if (num1 == principalSponsors.length) num1 = 0;
		}
	}

	if(document.getElementById("go_elephant_official_partners"))
	{
		if (officialPartners.length>1)
		{
			display("go_elephant_official_partners", officialPartners[num2]);
			num2++;
			if (num2 == officialPartners.length) num2 = 0;
		}
	}

	if(document.getElementById("go_elephant_sponsors"))
	{
		if (sponsors.length>1)
		{
			display("go_elephant_sponsors", sponsors[num3]);
			num3++;
			if (num3 == sponsors.length) num3 = 0;
		}
	}

}

function display(id, str) {
	document.getElementById(id).innerHTML = str;
}