var currentBanner = 0;
var bannerCount = 0;
var bannerMode = "Flow";
var splitBannerImages = "";
var splitBannerLinks = "";

function DynamicBanner()
{
	
	//Set up the arrays to hold the values, and set up some vars
	splitBannerImages = document.getElementById("bannerImages").value.split(";");
	splitBannerLinks = document.getElementById("bannerLinks").value.split(";");
	splitBannerDescs = document.getElementById("bannerDescs").value.split(";");
	
	//assume the default banner is loaded at startup, select the next banner in the list for second image.
	currentBanner = document.getElementById("defaultBanner").value;

	
	var modeDelay = document.getElementById("bannerModeDelay").value.split(" - ");
	bannerMode =  modeDelay[0];
	var delay = modeDelay[1];
	
	//Call it at start
	//ChangeBanner();

	bannerCount = splitBannerImages.length;
	if (currentBanner < (bannerCount - 1))
		currentBanner = parseInt(currentBanner) + 1;
	else
		currentBanner = 0;
	
	//set the interval to call changeBanner every delay, if only 1 banner no need
	if (bannerCount > 1) setInterval('ChangeBanner()', delay);
}

function ChangeBanner()
{	
	//Change the Banner
	document.getElementById("BannerLink").href = splitBannerLinks[currentBanner];
	
	swapfade(document.getElementById('BannerImage'), splitBannerImages[currentBanner], '2', splitBannerDescs[currentBanner])
	
	switch (bannerMode)
	{
	case "Flow":
	  	//Increment current Banner
		currentBanner++;
		//Check if we have reached last banner
		if(currentBanner >= bannerCount) currentBanner = 0;
	  	break
	case "Random":
  		x = currentBanner;
  		while(x == currentBanner)
  		{
  			x = RandomBanner();
  		}
  		currentBanner = x;
  		break
 	}
	
}

/* Function to change the banner (called when mode is random) */
function RandomBanner()
{
	var rand_no = Math.random();
	rand_no = rand_no * bannerCount;
	rand_no = Math.floor(rand_no);

	return rand_no;
}