// JavaScript Document

// (C) 2000 www.CodeLifter.com
// http://www.codelifter.com
// Free for all users, but leave in this  header
// NS4-6,IE4-6
// Fade effect only in IE; degrades gracefully

// =======================================
// set the following variables
// =======================================

// Set slideShowSpeed (milliseconds)
var slideShowSpeed = 4750;

// Duration of crossfade (seconds)
var crossFadeDuration = 3;

// Specify the image files
var Pic = new Array(); // don't touch this
// to add more images, just continue
// the pattern, adding to the array below

Pic[0] = 'images/Yoga-Logo.jpg';
Pic[1] = 'images/Rotate1-Yoga-Logo.jpg';
Pic[2] = 'images/Rotate2-Yoga-Logo.jpg';
Pic[3] = 'images/Rotate3-Yoga-Logo.jpg';
Pic[4] = 'images/Rotate4-Yoga-Logo.jpg';
Pic[5] = 'images/Rotate5-Yoga-Logo.jpg';
Pic[6] = 'images/Rotate6-Yoga-Logo.jpg';
Pic[7] = 'images/Rotate7-Yoga-Logo.jpg';
Pic[8] = 'images/Rotate8-Yoga-Logo.jpg';
Pic[9] = 'images/Rotate9-Yoga-Logo.jpg';

// =======================================
// do not edit anything below this line
// =======================================

var t;
var j = 0;
var p = Pic.length;

var preLoad = new Array()
for (i = 0; i < p; i++){
   preLoad[i] = new Image();
   preLoad[i].src = Pic[i];
}

function runSlideShow(){
	blendimage('slideshowDiv','slideShow', preLoad[j].src, 1000);

   j = j + 1;
   if (j > (p-1)) j=0;
   t = setTimeout('runSlideShow()', slideShowSpeed);
}

function opacity(id, opacStart, opacEnd, millisec) {
	//speed for each frame
	var speed = Math.round(millisec / 100);
	var timer = 0;

	//determine the direction for the blending, if start and end are the same nothing happens
	if(opacStart > opacEnd) {
		for(i = opacStart; i >= opacEnd; i--) {
			setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
			timer++;
		}
	} else if(opacStart < opacEnd) {
		for(i = opacStart; i <= opacEnd; i++)
			{
			setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
			timer++;
		}
	}
}

//change the opacity for different browsers
function changeOpac(opacity, id) {
	var object = document.getElementById(id).style; 
	object.opacity = (opacity / 100);
	object.MozOpacity = (opacity / 100);
	object.KhtmlOpacity = (opacity / 100);
	object.filter = "alpha(opacity=" + opacity + ")";
}

function shiftOpacity(id, millisec) {
	//if an element is invisible, make it visible, else make it ivisible
	if(document.getElementById(id).style.opacity == 0) {
		opacity(id, 0, 100, millisec);
	} else {
		opacity(id, 100, 0, millisec);
	}
}

function blendimage(divid, imageid, imagefile, millisec) {
	var speed = Math.round(millisec / 100);
	var timer = 0;
	
	//set the current image as background
	document.getElementById(divid).style.backgroundImage = "url(" + document.getElementById(imageid).src + ")";
	
	//make image transparent
	changeOpac(0, imageid);
	
	//make new image
	document.getElementById(imageid).src = imagefile;

	//fade in image
	for(i = 0; i <= 100; i++) {
		setTimeout("changeOpac(" + i + ",'" + imageid + "')",(timer * speed));
		timer++;
	}
}

function currentOpac(id, opacEnd, millisec) {
	//standard opacity is 100
	var currentOpac = 100;
	
	//if the element has an opacity set, get it
	if(document.getElementById(id).style.opacity < 100) {
		currentOpac = document.getElementById(id).style.opacity * 100;
	}

	//call for the function that changes the opacity
	opacity(id, currentOpac, opacEnd, millisec)
}