/* Copyright (c) 2007 Paul Bakaus (paul.bakaus@googlemail.com) and Brandon Aaron (brandon.aaron@gmail.com || http://brandonaaron.net)
 * Dual licensed under the MIT (http://www.opensource.org/licenses/mit-license.php)
 * and GPL (http://www.opensource.org/licenses/gpl-license.php) licenses.
 */
(function($){
$.fn.extend({
	_height: $.fn.height,
	_width: $.fn.width,
	height: function(val) {
		if ( this[0] == window )
			return self.innerHeight ||
				$.boxModel && document.documentElement.clientHeight ||
				document.body.clientHeight;

		if ( this[0] == document )
			return Math.max( document.body.scrollHeight, document.body.offsetHeight );

		return this._height(val);
	},
	width: function(val) {
		if ( this[0] == window )
			return self.innerWidth ||
				$.boxModel && document.documentElement.clientWidth ||
				document.body.clientWidth;

		if ( this[0] == document )
			return Math.max( document.body.scrollWidth, document.body.offsetWidth );

		return this._width(val);
	},
	innerHeight: function() {
		return this[0] == window || this[0] == document ?
			this.height() :
			this.is(':visible') ?
				this[0].offsetHeight - num(this, 'borderTopWidth') - num(this, 'borderBottomWidth') :
				this.height() + num(this, 'paddingTop') + num(this, 'paddingBottom');
	},
	innerWidth: function() {
		return this[0] == window || this[0] == document ?
			this.width() :
			this.is(':visible') ?
				this[0].offsetWidth - num(this, 'borderLeftWidth') - num(this, 'borderRightWidth') :
				this.width() + num(this, 'paddingLeft') + num(this, 'paddingRight');
	},
	outerHeight: function() {
		return this[0] == window || this[0] == document ?
			this.height() :
			this.is(':visible') ?
				this[0].offsetHeight :
				this.height() + num(this,'borderTopWidth') + num(this, 'borderBottomWidth') + num(this, 'paddingTop') + num(this, 'paddingBottom');
	},
	outerWidth: function() {
		return this[0] == window || this[0] == document ?
			this.width() :
			this.is(':visible') ?
				this[0].offsetWidth :
				this.width() + num(this, 'borderLeftWidth') + num(this, 'borderRightWidth') + num(this, 'paddingLeft') + num(this, 'paddingRight');
	},
	scrollLeft: function(val) {
		if ( val != undefined )
			return this.each(function() {
				if (this == window || this == document)
					window.scrollTo( val, $(window).scrollTop() );
				else
					this.scrollLeft = val;
			});

		if ( this[0] == window || this[0] == document )
			return self.pageXOffset ||
				$.boxModel && document.documentElement.scrollLeft ||
				document.body.scrollLeft;

		return this[0].scrollLeft;
	},
	scrollTop: function(val) {
		if ( val != undefined )
			return this.each(function() {
				if (this == window || this == document)
					window.scrollTo( $(window).scrollLeft(), val );
				else
					this.scrollTop = val;
			});

		if ( this[0] == window || this[0] == document )
			return self.pageYOffset ||
				$.boxModel && document.documentElement.scrollTop ||
				document.body.scrollTop;

		return this[0].scrollTop;
	},
	offset: function(options, returnObject) {
		var x = 0, y = 0, sl = 0, st = 0,
		    elem = this[0], parent = this[0], op, parPos, elemPos = $.css(elem, 'position'),
		    mo = $.browser.mozilla, ie = $.browser.msie, sf = $.browser.safari, oa = $.browser.opera,
		    absparent = false, relparent = false,
		    options = $.extend({ margin: true, border: true, padding: false, scroll: true, lite: false }, options || {});

		if (options.lite) return this.offsetLite(options, returnObject);

		if (elem.tagName.toLowerCase() == 'body') {
			x = elem.offsetLeft;
			y = elem.offsetTop;
			if (mo) {
				x += num(elem, 'marginLeft') + (num(elem, 'borderLeftWidth')*2);
				y += num(elem, 'marginTop')  + (num(elem, 'borderTopWidth') *2);
			} else
			if (oa) {
				x += num(elem, 'marginLeft');
				y += num(elem, 'marginTop');
			} else
			if (ie && jQuery.boxModel) {
				x += num(elem, 'borderLeftWidth');
				y += num(elem, 'borderTopWidth');
			}
		} else {
			do {
				parPos = $.css(parent, 'position');
				x += parent.offsetLeft;
				y += parent.offsetTop;
				if (mo || ie) {
					x += num(parent, 'borderLeftWidth');
					y += num(parent, 'borderTopWidth');
					if (mo && parPos == 'absolute') absparent = true;
					if (ie && parPos == 'relative') relparent = true;
				}
				op = parent.offsetParent;
				do {
					if (options.scroll) {
						sl += parent.scrollLeft;
						st += parent.scrollTop;
					}

					if (mo && parent != elem && $.css(parent, 'overflow') != 'visible') {
						x += num(parent, 'borderLeftWidth');
						y += num(parent, 'borderTopWidth');
					}
					parent = parent.parentNode;
				} while (parent != op);
				parent = op;
				if (parent.tagName.toLowerCase() == 'body' || parent.tagName.toLowerCase() == 'html') {
					if ((sf || (ie && $.boxModel)) && elemPos != 'absolute' && elemPos != 'fixed') {
						x += num(parent, 'marginLeft');
						y += num(parent, 'marginTop');
					}
					if ( (mo && !absparent && elemPos != 'fixed') ||
					     (ie && elemPos == 'static' && !relparent) ) {
						x += num(parent, 'borderLeftWidth');
						y += num(parent, 'borderTopWidth');
					}
					break;
				}
			} while (parent);
		}
		var returnValue = handleOffsetReturn(elem, options, x, y, sl, st);
		if (returnObject) { $.extend(returnObject, returnValue); return this; }
		else              { return returnValue; }
	},
	offsetLite: function(options, returnObject) {
		var x = 0, y = 0, sl = 0, st = 0, parent = this[0], op,
		    options = $.extend({ margin: true, border: true, padding: false, scroll: true }, options || {});
		do {
			x += parent.offsetLeft;
			y += parent.offsetTop;

			op = parent.offsetParent;
			if (options.scroll) {
				do {
					sl += parent.scrollLeft;
					st += parent.scrollTop;
					parent = parent.parentNode;
				} while(parent != op);
			}
			parent = op;
		} while (parent && parent.tagName.toLowerCase() != 'body' && parent.tagName.toLowerCase() != 'html');
		var returnValue = handleOffsetReturn(this[0], options, x, y, sl, st);
		if (returnObject) { $.extend(returnObject, returnValue); return this; }
		else              { return returnValue; }
	}
});
var num = function(el, prop) {
	return parseInt($.css(el.jquery?el[0]:el,prop))||0;
};
var handleOffsetReturn = function(elem, options, x, y, sl, st) {
	if ( !options.margin ) {
		x -= num(elem, 'marginLeft');
		y -= num(elem, 'marginTop');
	}
	if ( options.border && ($.browser.safari || $.browser.opera) ) {
		x += num(elem, 'borderLeftWidth');
		y += num(elem, 'borderTopWidth');
	} else if ( !options.border && !($.browser.safari || $.browser.opera) ) {
		x -= num(elem, 'borderLeftWidth');
		y -= num(elem, 'borderTopWidth');
	}
	if ( options.padding ) {
		x += num(elem, 'paddingLeft');
		y += num(elem, 'paddingTop');
	}
	if ( options.scroll ) {
		sl -= elem.scrollLeft;
		st -= elem.scrollTop;
	}
	return options.scroll ? { top: y - st, left: x - sl, scrollTop:  st, scrollLeft: sl }
	                      : { top: y, left: x };
};
})(jQuery);