Fx.Scroll2 = new Class({
	'Extends': Fx.Scroll,
	'styleString': Element.getComputedStyle,
	'styleNumber': function(element, style) {
		return this.styleString(element, style).toInt() || 0;
	},
	'borderBox': function(element) {
		return this.styleString(element, '-moz-box-sizing') == 'border-box';
	},
	'topBorder': function(element) {
		return this.styleNumber(element, 'border-top-width');
	},
	'leftBorder': function(element) {
		return this.styleNumber(element, 'border-left-width');
	},
	'isBody': function(element) {
		return (/^(?:body|html)$/i).test(element.tagName);
	}, 
	'toElement': function(el) {
		var offset   = {x: 0, y: 0};
		var element  = $(el);
		if (this.isBody(element)) {
			return offset;
		}
		var scroll = element.getScrolls();
		while (element && !this.isBody(element)){
			offset.x += element.offsetLeft;
			offset.y += element.offsetTop;
			if (Browser.Engine.gecko){
				if (!this.borderBox(element)){
					offset.x += this.leftBorder(element);
					offset.y += this.topBorder(element);
				}
				var parent = element.parentNode;
				if (parent && this.styleString(parent, 'overflow') != 'visible'){
					offset.x += this.leftBorder(parent);
					offset.y += this.topBorder(parent);
				}
			} else if (Browser.Engine.trident || Browser.Engine.webkit){
				offset.x += this.leftBorder(element);
				offset.y += this.topBorder(element);
			}
			element = element.offsetParent;
			if (Browser.Engine.trident) {
				while (element && !element.currentStyle.hasLayout) {
					element = element.offsetParent;
				}
			}
		}
		if (Browser.Engine.gecko && !this.borderBox(element)){
			offset.x -= this.leftBorder(element);
			offset.y -= this.topBorder(element);
		}
		var relative = this.element;
		var relativePosition = (relative && (relative = $(relative))) ? relative.getPosition() : {x: 0, y: 0};
		var position = {x: offset.x - scroll.x, y: offset.y - scroll.y};
		return this.start(position.x - relativePosition.x, position.y - relativePosition.y);
	}
});