var fading
var fadeSpeed
var pauseSpeed
var numImgs
var currentImg
var multiplier = 1
var opacity = 100

var internetExplorer = (document.getElementById && document.all);

function FadeImgGroup()
{
    if(document.getElementById)
    {    	
    	element = "ctl00_PageContent_img" + currentImg; 	
        selectedImg = document.getElementById(element);
        opacity = opacity - fading;
        
    	if(internetExplorer)
    	{    	
        	selectedImg.style.filter="alpha(opacity=0)";
			selectedImg.filters.alpha.opacity = opacity;
   		}
   		else
			selectedImg.style.MozOpacity = opacity/100;
			
		if(opacity == 0)
    	{
    		if(currentImg == numImgs)
    			resetElement = "ctl00_PageContent_img1";
    		else
    			resetElement = "ctl00_PageContent_img" + (currentImg + 1);
	
    		tempImg = document.getElementById(resetElement);
    		
    		if(internetExplorer)
    		{
        		tempImg.style.filter="alpha(opacity=0)";
				tempImg.filters.alpha.opacity = 100;
   			}
   			else    	
				tempImg.style.MozOpacity = 1;
				
			if(currentImg == 1)
				currentImg = numImgs;
			else
				currentImg = currentImg - 1;
			
			if(currentImg == 1)				
				document.getElementById("ctl00_PageContent_img1").style.zIndex = (numImgs + 1).toString();
			else if(currentImg == numImgs)
				document.getElementById("ctl00_PageContent_img1").style.zIndex = "1";
						
			opacity = 100;
			
			setTimeout('FadeImgGroup()', pauseSpeed);
        }
        else
        	setTimeout('FadeImgGroup()', fadeSpeed);	
  	}
}

function FadeImgPair()
{
    if(document.getElementById)
    {   	
        selectedImg = document.getElementById("ctl00_PageContent_img2");
        opacity = opacity - multiplier * fading;
        
        if(opacity < 0)
            opacity = 0;
        else if(opacity > 100)
            opacity = 100;    
        
    	if(internetExplorer)
    	{    	
        	selectedImg.style.filter="alpha(opacity=0)";
			selectedImg.filters.alpha.opacity = opacity;
   		}
   		else
			selectedImg.style.MozOpacity = opacity/100;
			
		if(opacity == 0 || opacity == 100)
    	{
    	    multiplier *= -1 
			
			setTimeout('FadeImgPair()', pauseSpeed);
        }
        else
        	setTimeout('FadeImgPair()', fadeSpeed);	
  	}    
}

function startShow(numImages, fadingMag, fadespeed, pausespeed)
{
    numImgs = numImages
  	currentImg = numImgs
  	
  	if(fadingMag === undefined)
  	    fading = 5;
    else
        fading = fadingMag;
    if(fadespeed === undefined)
        fadeSpeed = 100;
    else
        fadeSpeed = fadespeed;
    if(pausespeed === undefined)
        pauseSpeed = 5000;
    else
        pauseSpeed = pausespeed; 
  	
  	for(i = numImages; i >= 1; i--)
  	{
  	    tempImg = "ctl00_PageContent_img" + i
  	    document.getElementById(tempImg).style.zIndex = i;
  	}
  	
  	if(numImgs > 2)
  	    setTimeout('FadeImgGroup()', pauseSpeed);
    else
        setTimeout('FadeImgPair()', pauseSpeed); 	    
}