var scroller  = null;
var scrollbar = null;

window.onload = function () {
  scroller  = new jsScroller(document.getElementById("metro"), 174, 200);

}

function swapIt(o) {
	o.blur();
	if (o.className == "pordefecto") return false;
  
	var list = document.getElementById("Navigationmodcla").getElementsByTagName("a");
	for (var i = 0; i < list.length; i++) {
		if (list[i].className == "pordefecto") {
			list[i].className = "";
			document.getElementById(list[i].title).y = -scroller._y;
		}
		if (list[i].title == o.title) o.className = "pordefecto";
	}
  
	list = document.getElementById("Containermodcla").childNodes;
	for (var i = 0; i < list.length; i++) {
		if (list[i].tagName == "DIV") list[i].style.display = "none";
	}
  
	var top = document.getElementById(o.title);
	top.style.display = "block";

  
	return false;
}

function jsScroller (o, w, h) {
	var self = this;
	var list = o.getElementsByTagName("div");
	for (var i = 0; i < list.length; i++) {
		if (list[i].className.indexOf("Scroller-Container") > -1) {
			o = list[i];
		}
	}
	
	//Private methods
	this._setPos = function (x, y) {
		if (x < this.viewableWidth - this.totalWidth) 
			x = this.viewableWidth - this.totalWidth;
		if (x > 0) x = 0;
		if (y < this.viewableHeight - this.totalHeight) 
			y = this.viewableHeight - this.totalHeight;
		if (y > 0) y = 0;
		this._x = x;
		this._y = y;
		with (o.style) {
			left = this._x +"px";
			top  = this._y +"px";
		}
	};
	
	//Public Methods
	this.reset = function () {
		this.content = o;
		this.totalHeight = o.offsetHeight;
		this.totalWidth	 = o.offsetWidth;
		this._x = 0;
		this._y = 0;
		with (o.style) {
			left = "0px";
			top  = "0px";
		}
	};

	this.swapContent = function (c, w, h) {
		o = c;
		var list = o.getElementsByTagName("div");
		for (var i = 0; i < list.length; i++) {
			if (list[i].className.indexOf("Scroller-Container") > -1) {
				o = list[i];
			}
		}
		if (w) this.viewableWidth  = w;
		if (h) this.viewableHeight = h;
		this.reset();
	};
	
	//variables
	this.content = o;
	this.viewableWidth  = w;
	this.viewableHeight = h;
	this.totalWidth	 = o.offsetWidth;
	this.totalHeight = o.offsetHeight;
	this.scrollTimer = null;
	this.reset();
};