var banners = null;
var bannerCycle = null;
var bannerIndex = null;
var bannerCurrentImage = null;
var bannerDuration = null;
var bannerTimerId = null;
var bannerImage0 = null;
var bannerImage1 = null;


function onLoad()
{
	loadBanner();
}

function loadBanner()
{
	banners = new Array();
	
	banners[0] = new Array();
	banners[0]["image"] = "2";
	banners[0]["title"] = "Thank you!";
	banners[0]["text"] = "70 speakers and 300 participants attended to the 6th edition of the school’s annual social business conference. Thanks to all of them!";
	banners[0]["copyright"] = "Hervé Hellez";
	banners[0]["copyrightLink"] = "";

	banners[1] = new Array();
	banners[1]["image"] = "1";
	banners[1]["title"] = "7th Social Business Conference";
	banners[1]["text"] = "The annual Social Business Conference from HEC Paris began in 2003 with the aspiration to incorporate sustainability alongside social responsibility and business ethics into the business practices of the future business leaders at HEC Paris.";
	banners[1]["copyright"] = "Hervé Hellez";
	banners[1]["copyrightLink"] = "";

	banners[2] = new Array();
	banners[2]["image"] = "3";
	banners[2]["title"] = "Two days";
	banners[2]["text"] = "Filled with auditorium addresses, interactive panel sessions, networking events and ample opportunities for everyone involved to gain a deeper understanding of some of the world’s most complex challenges.";
	banners[2]["copyright"] = "Hervé Hellez";
	banners[2]["copyrightLink"] = "";

	bannerDuration = 20;
	bannerCurrentImage = -1;
 	bannerIndex = -1;
	bannerCycle = -1;

	$("banner").hide();
	$("bannerImageCache").hide();
	$("bannerImage1").hide();
	
	onBannerTimeOut();
}

function updateBanner()
{
	var i = null;
	
	do
	{
		i = Math.floor(Math.random() * 3);
	}
	while (i == bannerIndex);
	
	bannerIndex = i;
	bannerCycle++;
	
	if ((bannerCycle % 2) == 0)
	{
		bannerImage0 = "bannerImage1";
		bannerImage1 = "bannerImage0";
	}
	else
	{
		bannerImage0 = "bannerImage0";
		bannerImage1 = "bannerImage1";
	}
	
	$("bannerImageCache").src = "../resource/image/home/banner_" + banners[i]["image"] + ".jpg";
}

function onBannerTimeOut()
{
	if (bannerTimerId != null)
	{
		clearTimeout(bannerTimerId);
	}
	
	updateBanner();
	
	bannerTimerId = setTimeout("onBannerTimeOut()", bannerDuration * 1000);
}

function onBannerImageLoad(sender)
{
	sender.style.visibility = "visible";
}

function onBannerImageCacheLoad()
{
	if (bannerCycle == 0)
	{
		$("bannerTitle").innerHTML = banners[bannerIndex]["title"];
		$("bannerText").innerHTML = banners[bannerIndex]["text"];
		$("bannerImage0").src = $("bannerImageCache").src;
/* 		$("bannerButton").getElementsByTagName("a")[0].href = "/6/conference/";// + banners[bannerIndex]["image"]; */
		
		$("banner").style.height = "23.73em";
		$("banner").slideDown();
		
		$("bannerCopyright").innerHTML = formatCopyright(banners[bannerIndex]["copyright"], banners[bannerIndex]["copyrightLink"]);
	}
	else
	{
		$("bannerTextContainer").fade
		(
			{
				afterFinish: function()
				{
					$("bannerTitle").innerHTML = banners[bannerIndex]["title"];
					$("bannerText").innerHTML = banners[bannerIndex]["text"];
					$(bannerImage1).src = $("bannerImageCache").src;
/* 					$("bannerButton").getElementsByTagName("a")[0].href = "/6/conference/";// + banners[bannerIndex]["image"]; */
					
					$(bannerImage0).fade();
					$(bannerImage1).appear();
					$("bannerTextContainer").appear();
					
					$("bannerCopyright").innerHTML = formatCopyright(banners[bannerIndex]["copyright"], banners[bannerIndex]["copyrightLink"]);
				}
			}
		);
	}
}

function formatCopyright(copyright, link)
{
	var xhtml = "";
	
	if (copyright != "")
	{
		if (link != "")
		{
			xhtml = "Image by <a href=\"" + link + "\">" + copyright + "</a>";
		}
		else
		{
			xhtml = "Image by " + copyright;
		}
	}
	
	return xhtml;
}