var currentSection = "pane_1";
var tabTag = "-tab";
var paneTag = "pane_";

function ScrollSection(link, scrollArea, offset){

	if (currentSection == link){
		return;
	}
	lastSection = currentSection;
	currentSection = link;

	theScroll = document.getElementById(scrollArea);
	position = findElementPos(document.getElementById(link));
	
	if (offset != "") {
		offsetPos = findElementPos(document.getElementById(offset));
		position[0] = position[0] - offsetPos[0];
	}

	scrollStart(theScroll, theScroll.scrollLeft, position[0], "horiz");
}

function ScrollArrow(direction, scrollArea, offset) {

	toolbarElem = document.getElementById('content');
	toolbarNames = new Array();
    
    var theindi = toolbarElem.getElementsByTagName('div');
	if(theindi.length > 1){
		for (var i = 0; i < theindi.length; i++){
			if(theindi[i].className == "banntur_boxitem")
				toolbarNames.push(theindi[i].id.split("_")[1]);
		}
	}

	for(var i = 0; i < toolbarNames.length; i++){
		if (toolbarNames[i] == currentSection.split("_")[1]){
			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];
				}
			}
		}
	}

	ScrollSection(paneTag+gotoTab, scrollArea, offset);

}

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

function scrollStart(elem, start, end, 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++;
	}
}

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++;
	}
}

function findElementPos(elemFind){
	var elemX = 0;
	var elemY = 0;
	do {
		elemX += elemFind.offsetLeft;
		elemY += elemFind.offsetTop;
	} while ( elemFind = elemFind.offsetParent )

	return Array(elemX, elemY);
}

function sineInOut(t, b, c, d){
	return -c/2 * (Math.cos(Math.PI*t/d) - 1) + b;
}