displayPhoto = "t1"
numPhotos = 13;
running = true;

function move(directionNum){
	var pic = document.getElementById(displayPhoto);
	if(pic) {
		var nextnum = eval(eval(displayPhoto.slice(1)) + directionNum);
		if(nextnum > numPhotos){
			nextnum = 1;
		}
		if(nextnum < 1){
			nextnum = numPhotos;
		}
		displayPhoto = "t" + nextnum;
		pic.style.display = "none";
		pic.style.visibility = "hidden";
		var newpic = document.getElementById(displayPhoto);
		if(newpic) {
			newpic.style.display = "block";
			newpic.style.visibility = "";			
		}
	}
	
}

function advance() {
	//alert("advance " + displayPhoto);
	move(1);
}

function reverse() {
	move(-1);
}

function startSlideshow(){
	var playbtn = document.getElementById("viewSS");
	var pausebtn = document.getElementById("pauseSS");
	if(playbtn) {
		playbtn.style.display = "none";
		playbtn.style.visibility = "hidden";
	}
	if(pausebtn){
		pausebtn.style.display = "block";
		pausebtn.style.visibility = "";
	}
	runSlideshow();
}

function runSlideshow(){
	if(running){
		move(1);
		setTimeout("runSlideshow();", 2000);			
	}
}

function pauseStopSlideshow(){
	var pausebtn = document.getElementById("pauseSS");
	var resumebtn = document.getElementById("resumeSS");
	
	if(pausebtn){
		pausebtn.style.display = "none";
		pausebtn.style.visibility = "hidden";
	}	
	if(resumebtn) {
		resumebtn.style.display = "block";
		resumebtn.style.visibility = "";
	}
	
	running = false;
}

function resumeSlideshow(){
	var pausebtn = document.getElementById("pauseSS");
	var resumebtn = document.getElementById("resumeSS");
	
	if(pausebtn){
		pausebtn.style.display = "block";
		pausebtn.style.visibility = "";
	}	
	if(resumebtn) {
		resumebtn.style.display = "none";
		resumebtn.style.visibility = "hidden";
	}
	running = true;
	runSlideshow();
}

var yogaImages = new Array();

function setUpImages() {
    yogaImages.push("images/DSC_0140.JPG");
    yogaImages.push("images/DSC_0154.JPG");
    yogaImages.push("images/DSC_0155.JPG");
    yogaImages.push("images/DSC_0159.JPG");
    yogaImages.push("images/DSC_0160.JPG");
    yogaImages.push("images/DSC_0161.JPG");
    yogaImages.push("images/DSC_0165.JPG");
    yogaImages.push("images/DSC_0169.JPG");
    yogaImages.push("images/DSC_0170.JPG");
    yogaImages.push("images/DSC_0173.JPG");
    yogaImages.push("images/DSC_0175.JPG");
    yogaImages.push("images/DSC_0177.JPG");
    yogaImages.push("images/DSC_0178.JPG");

}

function doPreload()
{   
    setUpImages();
   
    for(var i = 0; i < yogaImages.length; i++) {               
        preloadImages(yogaImages[i]);
    }
   
}


function preloadImages(the_images_array) {

   for(var loop = 0; loop < the_images_array.length; loop++)   
   {
    var an_image = new Image();
    an_image.src = the_images_array[loop];
   
   }
}