/*
SAF.js
Script for Slideshow a Folder WP-plugin
Creator: Johan Stroem.
© swedish boy productions 2009
*/
safC=10;
safOne=1;
safTwo=2;
SAF_keptSlides=Array();

IE=document.all?true:false;
var Browser = {
  Version: function() {
    var version = 999; // we assume a sane browser
    if (navigator.appVersion.indexOf("MSIE") != -1)
      // bah, IE again, lets downgrade version number
      version = parseFloat(navigator.appVersion.split("MSIE")[1]);
    return version;
  }
}

function nextSlide() {
	if(SAF_slides.length==0) {
		SAF_slides=SAF_keptSlides;
		SAF_keptSlides=Array();
	}
	slide=SAF_slides.shift();
	SAF_keptSlides.push(slide);
	if(SAF_data[2]==0) bg_repeat='no-repeat';
	else bg_repeat='repeat';			
	slide="black url('"+SAF_dir+''+slide+"') center center "+bg_repeat;
	return slide;
}
function skipSlide() {
	window.status='SKIP!';
}
function SAF_create_layer(num) {
	safL = document.createElement('div');
	slide = nextSlide();
	safL.style.background=slide;
	safL.style.width=SAF_data[3];
	safL.style.height=SAF_data[4];
	safL.style.zIndex=2-num;
	safL.style.position='absolute';
	safL.style.top=0;
	safL.style.left=0;
	safL.id='saf_'+num;
	return safL;
}
function createNextButton() {
	safL = document.createElement('div');
	safL.className='SAF_Button';
	safL.id='SAF_next';
	return safL;
}

function SAF_change_header(element) {
	if(element && SAF_dir && SAF_slides[1]) {
	element = document.getElementById(element);
	layer1 = SAF_create_layer(1);
	element.appendChild(layer1);
	layer2 = SAF_create_layer(2);
	element.appendChild(layer2);
	
	/*
	nextB = createNextButton();
	nextB.innerHTML="NEXT";
	element.appendChild(nextB);
	*/
	// launch it.
	setTimeout(SAF_SlideShow,SAF_data[0]);
	}else{
	window.status='Slideshow A Folder failed to load correct data.';
	}
}
//slow=true;
function SAF_SlideShow() {
	// are we there yet?
	if(safC>0) {
		topSlide=eval('layer'+safOne);
		backSlide=eval('layer'+safTwo);

		if(IE) 	{
			if(Browser.Version() >= 7) topSlide.style.filter='alpha(opacity='+(safC*10)+')';
		}else 	topSlide.style.opacity=0.1*safC;
		
		safC=safC-SAF_data[5]; 		
		//else safC=safC-1;
		
		setTimeout("SAF_SlideShow()",45);
	}else{
	// time to flip slide
		topSlide.style.zIndex=1;
		backSlide.style.zIndex=2;
		//reseting stuff
		if(IE) 	{
			if(Browser.Version() >= 7) 	topSlide.style.filter='alpha(opacity=100)';
		}else 	topSlide.style.opacity=1;
		// next slide please
		slide=nextSlide();
		// put in on the back layer
		topSlide.style.background=slide;
		//what's up, what's next?
		safOne = safOne==1 ? 2 : 1;
		safTwo = safTwo==2 ? 1 : 2;
		//ok, let's run it again...
		safC=10;
		setTimeout(SAF_SlideShow,SAF_data[0]);		
	}
}