var imageCursor = 1;

function previousImage() {
	imageCursor--;
	if(imageCursor < 1) imageCursor = popUpImageCount;
	drawImage();
	return false;
}

function nextImage() {
	imageCursor++;
	if(imageCursor > popUpImageCount) imageCursor = 1;
	drawImage();
	return false;
}

function drawImage(img) {
	var tempId = "";
	var i = 1;
	for(i=1;i<=popUpImageCount;i++) {
		tempId = "popUpImage_" + i;
		document.getElementById(tempId).style.display = "none";
	}
	if(img){tempId = "popUpImage_" + img;}else{tempId = "popUpImage_" + imageCursor;}
	document.getElementById(tempId).style.display = "block";
	return false;
}

function autoSizeWhenReady(img) {
	if(document.images[0].complete != false) {	//*** true or undefined
		autoSize();
		drawImage(img);
	} else {
		setTimeout(autoSizeWhenReady(), 500);
	}
	
	return false;
}
function autoSize() {
	var maxWidth = 0;
	var maxHeight = 0;
	var i = 0;
	var imagesLength = document.images.length;
	for(i = 0;i<imagesLength; i++) {
		if(document.images[i].width > maxWidth) maxWidth = document.images[i].width;
		if(document.images[i].height > maxHeight) maxHeight = document.images[i].height;
	}
	var width = maxWidth + 200;
	var height = maxHeight + 225;
	if(height > screen.availHeight ) height = screen.availHeight  - 100;
	window.resizeTo(width, height);
}