var startSlide = false;
var imageObj = new Array();
var number_of_image = imageObj.length;

function startSlideShow() {
	startSlide = true;
	
	if ( document.all ) {
		setTimeout("rotateImage('aniImg')",5000);
	} else {
		timeimgs(0);
	}
}


// Other Browsers
function timeimgs(numb) {
	if ( startSlide ) {
		thetimer = setTimeout("imgturn('" +numb+ "')", 5000);
	}
}

function imgturn(numb) {
	try {
		if ( numb == (imageObj.length-1) ) {
			blendimage("aniDiv", "aniImg", "imageObj["+numb+"].src", 500);
			timeimgs(0);
		} else {
			blendimage("aniDiv", "aniImg", "imageObj["+numb+"].src", 500);
			timeimgs(numb = ++numb);
		}
	} catch(e) {}
}



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 = eval(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)
}


// IE Version
var interval = 5000; 
var random_display = 0;
var ImageNum = -1;
var slideStatus = 1;

function randNum(x, y) {
	var range = y - x + 1;
	return Math.floor(Math.random() * range) + x;
}

function getNextImage() {
	if (random_display) {
		ImageNum = randNum(0, number_of_image-1);
	}
	else {
		ImageNum = (ImageNum+1) % number_of_image;
	}
	new_image = eval("imageObj[ImageNum].src");
	return(new_image);
}

function rotateImage(place) {
	if ( startSlide ) {
		try {
			var panelObj = document.getElementById(place);
			var new_image = getNextImage();
			panelObj.filters.item(0).Apply();
			panelObj.src = new_image;
			panelObj.filters.item(0).Play();
			
			var recur_call = "rotateImage('"+place+"')";
			timerID = setTimeout(recur_call, interval);
		} catch(e) {}
	}
}