/* DHTML SlideShow - Copyright Berg 2007 */

var slideShow_count = 1;
var slideShow_timer;
var slideShow_scroll = 10000;
var slideShow_total = 0;
var slideShow_pause = false;
var slideShow_direction = 1;
var slideShow_fadeDuration = 1000;

var t;

function SlideShow_Pause()
{
    slideShow_pause = !slideShow_pause;
    if (slideShow_pause && slideShow_timer)
        window.clearTimeout(slideShow_timer);
    else
        _PlaySlideShow();
}
function SlideShow_PlayForwards()
{    
     slideShow_direction = 1;
     _PlaySlideShow();    
    
}
function SlideShow_PlayBackwards()
{    
    slideShow_direction = -1;
    _PlaySlideShow();
}
function _PlaySlideShow()
{         
    //fade out current slide        
	var img = new Fx.Style('slide_' + slideShow_count + "_image", 'opacity', {duration: slideShow_fadeDuration, transition: Fx.Transitions.linear});		    	
	img.start(1, 0);	
	var txt = new Fx.Style('slide_' + slideShow_count + "_text", 'opacity', {duration: slideShow_fadeDuration, transition: Fx.Transitions.linear});		    	
	txt.start(1, 0);
	
	//update count
	if(slideShow_direction==1) 
		if(slideShow_count < slideShow_total)
			slideShow_count = slideShow_count + 1;
		 else 
			slideShow_count = 1;		
	else
		if(slideShow_count > 1) 
			slideShow_count = slideShow_count - 1;
		else 
			slideShow_count=slideShow_total;
			
	//fade in new slide			
	var img2 = new Fx.Style('slide_' + slideShow_count + "_image", 'opacity', {duration: slideShow_fadeDuration, transition: Fx.Transitions.linear});		    	
	img2.start(0, 1);			
	var txt2 = new Fx.Style('slide_' + slideShow_count + "_text", 'opacity', {duration: slideShow_fadeDuration, transition: Fx.Transitions.linear});		    	
	txt2.start(0, 1); 
			
	//update counter
	_ShowCounter();    		

    //recurse 
    window.clearTimeout(slideShow_timer);
    slideShow_timer = setTimeout("_PlaySlideShow();", slideShow_scroll);    
}
function _ShowCounter()
{
     var s = document.getElementById("counter");	
     if (s)
	    s.innerHTML = slideShow_count + "/" + slideShow_total;
}
function SlideShow_Play()
{     
    var ss = document.getElementById("slideShow");	
    if (ss) 
    	ss.style.visibility = "visible";

    for (var i=1  ; i < 20; i++) 
	if (document.getElementById("slide_"+i+"_image"))
		slideShow_total++;
	else
		break;	      
	     
    _ShowCounter();

    if (slideShow_total  > 1) {
	window.clearTimeout(slideShow_timer);
	slideShow_timer = setTimeout("_PlaySlideShow();", slideShow_scroll); 	 
    }
}