var currentSection = "st0-pane"; // The default loaded section on the page
var tabTag = "-tab";
var paneTag = "-pane";

// Scroll the page manually to the position of element "link", passed to us.

function ScrollSection(link, scrollArea, offset)
{
	
	// Store the last section, and update the current section

	if (currentSection == link) {
		return;
	}
	lastSection = currentSection;
	currentSection = link;
	
	// Change the section highlight.
    
	// Get the element we want to scroll, get the position of the element to scroll to
	
	theScroll = document.getElementById(scrollArea);
	position = findElementPos(document.getElementById(link));
	//console.log(link+'/'+offset);
	// Get the position of the offset div -- the div at the far left.
	// This is the amount we compensate for when scrolling
	
	if (offset != "") {
		offsetPos = findElementPos(document.getElementById(offset));
		position[0] = position[0] - offsetPos[0];
	}

	
	scrollStart(theScroll, theScroll.scrollLeft, position[0], "horiz");
	// return false;
}
function ScrollArrow(direction, toolbar, scrollArea, offset) {

	toolbarElem = document.getElementById(toolbar);
	toolbarNames = new Array();
    
	// Find all the <li> elements in the toolbar, and extract their id's into an array.
    
	if (toolbarElem.hasChildNodes())
	{
		var children = toolbarElem.childNodes;
		for (var i = 0; i < children.length; i++) 
		{
			if (toolbarElem.childNodes[i].tagName == "LI") {
				toolbarNames.push(toolbarElem.childNodes[i].id.split("-")[0]);
			}
		}
	}

	// Now iterate through our array of tab names, find matches, and determine where to go.

	for (var i = 0; i < toolbarNames.length; i++) {
		if (toolbarNames[i] == currentSection.split("-")[0]) {
			if (direction == "left") {
				if (i - 1 < 0) {
					gotoTab = toolbarNames[toolbarNames.length - 1];
				} else {
					gotoTab = toolbarNames[i - 1];
				}
			} else {
				if ((i + 1) > (toolbarNames.length - 1)) {
					gotoTab = toolbarNames[0];
				} else {
					gotoTab = toolbarNames[i + 1];
				}
			}
		}
	}
	
	// Go to the section name!
	
	ScrollSection(gotoTab+paneTag, scrollArea, offset);

}
var scrollanim = {time:0, begin:0, change:0.0, duration:0.0, element:null, timer:null};

function scrollStart(elem, start, end, direction)
{
	//console.log("scrollStart from "+start+" to "+end+" in direction "+direction);

	if (scrollanim.timer != null) {
		clearInterval(scrollanim.timer);
		scrollanim.timer = null;
	}
	scrollanim.time = 0;
	scrollanim.begin = start;
	scrollanim.change = end - start;
	scrollanim.duration = 25;
	scrollanim.element = elem;
	
	if (direction == "horiz") {
		scrollanim.timer = setInterval("scrollHorizAnim();", 15);
	}
	else {
		scrollanim.timer = setInterval("scrollVertAnim();", 15);
	}
}

function scrollVertAnim()
{
	if (scrollanim.time > scrollanim.duration) {
		clearInterval(scrollanim.timer);
		scrollanim.timer = null;
	}
	else {
		move = sineInOut(scrollanim.time, scrollanim.begin, scrollanim.change, scrollanim.duration);
		scrollanim.element.scrollTop = move; 
		scrollanim.time++;
	}
}

function scrollHorizAnim()
{
	if (scrollanim.time > scrollanim.duration) {
		clearInterval(scrollanim.timer);
		scrollanim.timer = null;
	}
	else {
		move = sineInOut(scrollanim.time, scrollanim.begin, scrollanim.change, scrollanim.duration);
		scrollanim.element.scrollLeft = move;
		scrollanim.time++;
	}
}
function findElementPos(elemFind)
{
	var elemX = 0;
	var elemY = 0;
	do {
		elemX += elemFind.offsetLeft;
		elemY += elemFind.offsetTop;
	} while ( elemFind = elemFind.offsetParent )

	//console.log("Found element "+elemFind+" at "+elemY+"/"+elemX);

	return Array(elemX, elemY);
}
function sineInOut(t, b, c, d)
{
	return -c/2 * (Math.cos(Math.PI*t/d) - 1) + b;
}
// Utility: Get the size of the window, and set myWidth and myHeight
// Credit to quirksmode.org
myHeight = '';
myWidth = '';
myScroll = '';
function getSize() {

	// Window Size

	if (self.innerHeight) { // Everyone but IE
		myWidth = window.innerWidth;
		myHeight = window.innerHeight;
		myScroll = window.pageYOffset;
	} else if (document.documentElement && document.documentElement.clientHeight) { // IE6 Strict
		myWidth = document.documentElement.clientWidth;
		myHeight = document.documentElement.clientHeight;
		myScroll = document.documentElement.scrollTop;
	} else if (document.body) { // Other IE, such as IE7
		myWidth = document.body.clientWidth;
		myHeight = document.body.clientHeight;
		myScroll = document.body.scrollTop;
	}

	// Page size w/offscreen areas

	if (window.innerHeight && window.scrollMaxY) {	
		myScrollWidth = document.body.scrollWidth;
		myScrollHeight = window.innerHeight + window.scrollMaxY;
	} else if (document.body.scrollHeight > document.body.offsetHeight) { // All but Explorer Mac
		myScrollWidth = document.body.scrollWidth;
		myScrollHeight = document.body.scrollHeight;
	} else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
		myScrollWidth = document.body.offsetWidth;
		myScrollHeight = document.body.offsetHeight;
	}
}
function showLargePopup(content, autoriaus, img, type, t) {
	if (type == undefined) types = ''; else types = type;
    var popFullscreen = document.getElementById('fullscreen');
    var popLarge = document.getElementById('largepopup'+types);

	// Put the correct content in the pop-up

	//if (navigator.platform.indexOf('Mac') != -1) {
	//	document.getElementById('start-download').className = 'show';
	//	document.getElementById('wrong-os').className = 'hide';
	//} else {
	//	document.getElementById('start-download').className = 'hide';
	//	document.getElementById('wrong-os').className = 'show';
	//}
 
 	//document.getElementById('start-download').className = 'show';
	// document.getElementById('wrong-os').className = 'hide';
    
    // Make fullscreen thing really full screen, and show it
    getSize();
    
    popFullscreen.style.height = myScrollHeight + 'px';
    popFullscreen.style.display = 'block';
	
    // Position pop-up

     if (type == undefined) document.getElementById('pop_content'+types).innerHTML = document.getElementById(content).innerHTML;
     else {
     	
     	document.getElementById('pop_content'+types).innerHTML = document.getElementById(content).innerHTML;
     	popLarge.style.display = 'block';
     	puse = document.getElementById('pop_content'+types).offsetHeight/2;
     	popLarge.style.marginTop = ((myHeight / 2) - puse) + 'px';
     	puse = 250;
     	popLarge.style.marginLeft = ((myWidth / 2) - puse)+ 'px';
     	
     	    document.getElementById('pop_rightc').style.marginLeft = (document.getElementById('pop_content'+types).offsetWidth-48)+'px';
        	//popLarge.style.marginLeft = ((972-document.getElementById(content).offsetWidth) / 2)+'px';
			if (current_img != 0) {
				document.getElementById('pop_left').style.display = 'block';
			} else {
				document.getElementById('pop_left').style.display = 'none';
			}
			if (current_img == (amount_images-1)) {
				document.getElementById('pop_right').style.display = 'none';
			} else {

				document.getElementById('pop_right').style.display = 'block';
			}
			document.getElementById('pop_leftc').style.marginTop = -((document.getElementById('pop_content'+types).offsetHeight +84)/2) +'px';
			document.getElementById('pop_rightc').style.marginTop = -((document.getElementById('pop_content'+types).offsetHeight +84)/2) +'px';
			document.getElementById('pop_content'+types).innerHTML = document.getElementById(content).innerHTML;
			if (t == undefined) showLargePopup(content, autoriaus, img, type, '');

     }
    document.getElementById('pop_autorius'+types).innerHTML = document.getElementById(autoriaus).innerHTML;
    if (type == undefined) document.getElementById('pop_imgas').innerHTML = document.getElementById(img).innerHTML;
    popLarge.style.display = 'block';
		// if (type == undefined) {
		// 	alert($(window).scrollTop());
		// 	popLarge.style.marginTop = ($(window).height()/2) - $(popLarge).height()+window.scrollTop+'px';
		// }
}

function show_next() {
current_img++;
showLargePopup('atsil_'+current_img,'aut_'+current_img,'', 2);
}
function show_prev() {
current_img--;
showLargePopup('atsil_'+current_img,'aut_'+current_img,'', 2);
}
function setLocation(loc) {
	window.location = loc;
}

function hideLargePopup() {
    var popFullscreen = document.getElementById('fullscreen');
    var popLarge = document.getElementById('largepopup');
  	document.getElementById('largepopup2').style.display = 'none';
    popLarge.style.display = 'none';
    popFullscreen.style.display = 'none';
}

//
// DOWNLOAD SMALL POPUP: Download Hint Pop-up Functions
//
// An advantage of using a timer to do a hide is that we can ignore
// any spurious mouseOut events that have bubbled up, into <td>'s, etc.

var dpopTimer = "";

function showDownloadPopup(e) {
	var popDownload = document.getElementById('dpop');
	var btnDownload = document.getElementById('download');

	if (moveanim.timer != null) {
		clearInterval(moveanim.timer);
		moveanim.timer = null;
	}

	// Determine where we should pop up in relation to the download button

	position = findElementPos(btnDownload);
	popDownload.style.top = (position[1] - (popDownload.offsetHeight - 40)) +"px";
	popDownload.style.left = "5" + "px";

	// If already trigger a rollover, cancel it because we're back in

	if (dpopTimer != "")
	{
		clearTimeout(dpopTimer);
		dpopTimer = "";
	} else {
		setOpacity(0, 'dpop');
		popDownload.style.visibility = 'visible';
		moveStart(popDownload, parseInt(popDownload.style.left), parseInt(popDownload.style.left), parseInt(popDownload.style.top) + 10, parseInt(popDownload.style.top), 15);
		fadeElementSetup('dpop', 0, 100, 13);
	}
}

function hideDownloadPopup() {
	// Start timer to hide the pop-up and the overlay
	dpopTimer = setTimeout("actuallyHide()", 500);
}

function actuallyHide() {
	var popDownload = document.getElementById('dpop');
	if (dpopTimer != "")
	{
		dpopTimer = "";
		moveStart(popDownload, parseInt(popDownload.style.left), parseInt(popDownload.style.left), parseInt(popDownload.style.top), parseInt(popDownload.style.top) - 10, 15);		
		fadeElementSetup('dpop', 100, 0, 13, 1);
	}
}

//
// MOVE: Animate the move of an element.
//
// Move is also synchronous. One at a time, please.
//

var moveanim = {time:0, beginX:0, changeX:0.0, beginY:0, changeY:0, duration:0.0, element:null, timer:null};

function moveStart(elem, startX, endX, startY, endY, duration)
{
	if (moveanim.timer != null) {
		clearInterval(moveanim.timer);
		moveanim.timer = null;
	}
	moveanim.time = 0;
	moveanim.beginX = startX;
	moveanim.changeX = endX - startX;
	moveanim.beginY = startY;
	moveanim.changeY = endY - startY;
	moveanim.duration = duration;
	moveanim.element = elem;

	moveanim.timer = setInterval("moveAnimDo();", 15);
}

function moveAnimDo()
{
	if (moveanim.time > moveanim.duration) {
		clearInterval(moveanim.timer);
		moveanim.timer = null;
	}
	else {
		moveX = cubicOut(moveanim.time, moveanim.beginX, moveanim.changeX, moveanim.duration);
		moveY = cubicOut(moveanim.time, moveanim.beginY, moveanim.changeY, moveanim.duration);
		moveanim.element.style.left = moveX + "px";
		moveanim.element.style.top = moveY + "px";
		moveanim.time++;
	}
}