function imgSwap(imgObj) {
	$('shownImg').src = "images/gallery/" + imgObj.img + ".jpg";
	if(imgObj.cap == '') {
		r = defaultCaption.length;
		var randomCaption=Math.floor(Math.random()*r);
		$('captiontext').innerHTML=defaultCaption[randomCaption];
	}else{
	//ew	$('captiontext').innerHTML='Photo # ' + imgObj.cap;
		$('captiontext').innerHTML=imgObj.cap;
	}
}

imgControlObj = {};

function popPic(src){
	if (!window.picDiv){
		picDiv = document.createElement('div') ;
		picDiv.id = 'pictureDiv';
		picDiv.style.border="1px solid black";
		picDiv.style.position = 'absolute';
		document.body.appendChild(picDiv);
		Event.observe(picDiv,'click',function(){picDiv.style.visibility='hidden'})
		picDiv.appendChild(new Image());
	}
	var adj = 1;
	getScroll();
	picDiv.style.visibility='visible';
	picDiv.innerHTML = '<img src="'+src.replace('.jpg','_l.jpg')+'">';
	
	picDiv.firstChild.onload = function(){
		var width = Math.round(this.width);
		var height = Math.round(this.height);
		adj = windowHeight/height;
		height = height * adj;
		width = width * adj;
		
	
		this.width = width;
		this.height = height;
		picDiv.style.top = scrollTop+((windowHeight-picDiv.clientHeight)/2) +'px';
		picDiv.style.left = scrollLeft+((document.body.clientWidth-picDiv.clientWidth)/2) +'px';
		picDiv.style.zIndex = 10000;
	}
}

function buildImageDiv(i) {
	var simg = document.createElement('img');
	simg.setAttribute('arrayIndex',i);
	simg.className='thumb_img';
	simg.src='images/gallery/' + imgArray[i].img + '_t.jpg';
	simg.onclick=function(){ imgSwap(imgArray[i]); }
	return simg;
}
function init() {
	gSliderDiv = $('sliderDiv');
	is_chrome = navigator.userAgent.toLowerCase().indexOf('chrome') > -1;
	for(var i=0;i<5;i++) {
		var d = buildImageDiv(i);
		gSliderDiv.appendChild(d);
	}
	r = defaultCaption.length;
	var randomCaption=Math.floor(Math.random()*r);
/*	$('captiontext').innerHTML=defaultCaption[randomCaption];*/
	$('shownImg').src = "images/gallery/" + imgArray[0].img + ".jpg";	
	gSliderDiv.style.left = '0px';
	
	$('captionarea').style.visibility = "hidden";

	for(var i=0;i<5;i++) {
		var q = (imgArray.length-5) + i;
		preImage= new Image();
		preImage.src = 'images/gallery/' + imgArray[q].img + '_t.jpg';
	}
}


function clickRight() {
	gSliderDiv.appendChild(buildImageDiv(calcLeft()));
	gSliderDiv.appendChild(buildImageDiv(calcLeft()));
	gSliderDiv.appendChild(buildImageDiv(calcLeft()));
	gSliderDiv.appendChild(buildImageDiv(calcLeft()));
	gSliderDiv.appendChild(buildImageDiv(calcLeft()));
	if (gSliderDiv.childNodes.length == 10) {
		imgControlObj.shiftControl=imgShift(5);
	}else{
		imgControlObj.shiftControl(1);
	}
}
function clickLeft() {
	gSliderDiv.insertBefore(buildImageDiv(calcRight()),gSliderDiv.firstChild);
	gSliderDiv.insertBefore(buildImageDiv(calcRight()),gSliderDiv.firstChild);
	gSliderDiv.insertBefore(buildImageDiv(calcRight()),gSliderDiv.firstChild);
	gSliderDiv.insertBefore(buildImageDiv(calcRight()),gSliderDiv.firstChild);
	gSliderDiv.insertBefore(buildImageDiv(calcRight()),gSliderDiv.firstChild);
	if (gSliderDiv.childNodes.length == 10) {
		gSliderDiv.style.left='-825px';
		imgControlObj.shiftControl=imgShift(-5);
	}else{
		gSliderDiv.style.left=(parseFloat(gSliderDiv.getStyle('left'))-825) + 'px';
		imgControlObj.shiftControl(-1);
	}
	for(var i=0;i<5;i++) {
		var q = (imgControlObj.shiftControl-5) + i;
		preImage= new Image();
		preImage.src = 'images/gallery/' + imgArray[q].img + '_t.jpg';
	}
}


function calcLeft() { 
	var i = parseFloat(gSliderDiv.lastChild.getAttribute('arrayIndex')) + 1;
	if (i == imgArray.length) {
		i=0;
	}
	return i;

}
function calcRight() {
	var i = parseFloat(gSliderDiv.firstChild.getAttribute('arrayIndex')) - 1;
	if (i < 0) {
		i=imgArray.length-1;
	}
	return i;
}


function imgShift(px) {
	var w = 165;
	var dir = (px*-1)/Math.abs(px);
	px = px*w;
	var left = parseFloat(gSliderDiv.getStyle('left')) || 0;
	px = Math.abs(px);
	var speed = 3;
	imgMove();
	
	function imgMove() {
		if (px <= 0) {
			imgCleanup();
			return;
		}
		if (px < 7)
			speed = 1;
		else if (px < 15)
			speed = 2;
		else if (px < 26)
			speed = 3;
		else if (px < 41)
			speed = 4;
		else if (px < 60)
			speed = 5;
		else if (px < 81)
			speed = 6;
		else if (px < 106)
			speed = 7;
		else if (px < 134)
			speed = 8;
		else if (px < 165)
			speed = 9;
		else if (px < 200)
			speed = 10;
		else if (px < 238)
			speed = 11;
		else if (px < 280)
			speed = 12;
		else 
			speed = 13;
			
		left = left + (dir*speed);
		px=px-speed;

		gSliderDiv.style.left = left + 'px';
		setTimeout(imgMove,25);
	}
	function imgCleanup() {
		while (left < 0) {
			gSliderDiv.removeChild(gSliderDiv.firstChild);
			left=left+w;
		}
		while (gSliderDiv.childNodes.length > 5) {
			gSliderDiv.removeChild(gSliderDiv.lastChild);	
		}
		gSliderDiv.style.left = '0px';
	}
	function shiftControl(i) {
		if (dir == i){
			dir *= -1;  
			px = w-(px%w);
		}
		else
			px+=(5*w);

		if (i < 0) 
			left-=(5*w);
	}
	return shiftControl;
}