var cur_opacity = 0;
var target_opacity = 0;

var cur_img = 0;
var cur_imgs;
var total_imgs = 0;

var spinner = "images/spinner.gif";

var pgallery_timer = setInterval("timer_pgallery()", 40);

function close_pgallery(){
	target_opacity = 0;
}

function open_pgallery(){
	target_opacity = 100;
}

function swap_pgallery(title, imgs){
	var pg_title = document.getElementById("pgallery_title");
	pg_title.innerHTML = title;

	var pg_img = document.getElementById("pgallery_img");
	pg_img.src = spinner;
	pg_img.src = imgs[0];

	cur_img = 0;
	cur_imgs = imgs;
	total_imgs = imgs.length - 1;

	open_pgallery();
}

function next_pgallery(){
	cur_img++;
	if (cur_img > total_imgs){
		cur_img = 0;
	}

	var pg_img = document.getElementById("pgallery_img");
	pg_img.src = spinner;
	pg_img.src = cur_imgs[cur_img];
}

function timer_pgallery(){
	var pg_main = document.getElementById("pgallery");

	if (cur_opacity < target_opacity){
		cur_opacity += 5;
	}
	if (cur_opacity > target_opacity){
		cur_opacity -= 5;
	}

	var css_opacity = cur_opacity;
	if (cur_opacity < 10){
		css_opacity = "0" + cur_opacity;
	}

	if (cur_opacity == 0){
		pg_main.style.cssText = "display:none;";
	} else {
		if (cur_opacity == 100){
			pg_main.style.cssText = "display:block;";
		} else {
			pg_main.style.cssText = "display:block;-moz-opacity:0." + css_opacity + ";opacity:0." + css_opacity + ";filter:alpha(opacity=" + css_opacity + ")";
		}
	}
}