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;(function( $ ){	
	var $scrollTo = $.scrollTo = function( target, duration, settings ){
		$(window).scrollTo( target, duration, settings );
	};
	$scrollTo.defaults = {
		axis:'xy',
		duration: parseFloat($.fn.jquery) >= 1.3 ? 0 : 1
	};	
	$scrollTo.window = function( scope ){
		return $(window)._scrollable();
	};	
	$.fn._scrollable = function(){
		return this.map(function(){
			var elem = this,
				isWin = !elem.nodeName || $.inArray( elem.nodeName.toLowerCase(), ['iframe','#document','html','body'] ) != -1;
				if( !isWin )
					return elem;
			var doc = (elem.contentWindow || elem).document || elem.ownerDocument || elem;			
			return $.browser.safari || doc.compatMode == 'BackCompat' ?
				doc.body : 
				doc.documentElement;
		});
	};
	$.fn.scrollTo = function( target, duration, settings ){
		if( typeof duration == 'object' ){
			settings = duration;
			duration = 0;
		}
		if( typeof settings == 'function' )
			settings = { onAfter:settings };			
		if( target == 'max' )
			target = 9e9;			
		settings = $.extend( {}, $scrollTo.defaults, settings );		
		duration = duration || settings.speed || settings.duration;		
		settings.queue = settings.queue && settings.axis.length > 1;		
		if( settings.queue )			
			duration /= 2;
		settings.offset = both( settings.offset );
		settings.over = both( settings.over );
		return this._scrollable().each(function(){
			var elem = this,
				$elem = $(elem),
				targ = target, toff, attr = {},
				win = $elem.is('html,body');
			switch( typeof targ ){				
				case 'number':
				case 'string':
					if( /^([+-]=)?\d+(\.\d+)?(px|%)?$/.test(targ) ){
						targ = both( targ );						
						break;
					}					
					targ = $(targ,this);
				case 'object':					
					if( targ.is || targ.style )						
						toff = (targ = $(targ)).offset();
			}
			$.each( settings.axis.split(''), function( i, axis ){
				var Pos	= axis == 'x' ? 'Left' : 'Top',
					pos = Pos.toLowerCase(),
					key = 'scroll' + Pos,
					old = elem[key],
					max = $scrollTo.max(elem, axis);
				if( toff ){
					attr[key] = toff[pos] + ( win ? 0 : old - $elem.offset()[pos] );					
					if( settings.margin ){
						attr[key] -= parseInt(targ.css('margin'+Pos)) || 0;
						attr[key] -= parseInt(targ.css('border'+Pos+'Width')) || 0;
					}					
					attr[key] += settings.offset[pos] || 0;					
					if( settings.over[pos] )						
						attr[key] += targ[axis=='x'?'width':'height']() * settings.over[pos];
				}else{ 
					var val = targ[pos];					
					attr[key] = val.slice && val.slice(-1) == '%' ? 
						parseFloat(val) / 100 * max
						: val;
				}				
				if( /^\d+$/.test(attr[key]) )					
					attr[key] = attr[key] <= 0 ? 0 : Math.min( attr[key], max );				
				if( !i && settings.queue ){					
					if( old != attr[key] )						
						animate( settings.onAfterFirst );					
					delete attr[key];
				}
			});
			animate( settings.onAfter );
			function animate( callback ){
				$elem.animate( attr, duration, settings.easing, callback && function(){
					callback.call(this, target, settings);
				});
			};
		}).end();
	};		
	$scrollTo.max = function( elem, axis ){
		var Dim = axis == 'x' ? 'Width' : 'Height',
			scroll = 'scroll'+Dim;		
		if( !$(elem).is('html,body') )
			return elem[scroll] - $(elem)[Dim.toLowerCase()]();		
		var size = 'client' + Dim,
			html = elem.ownerDocument.documentElement,
			body = elem.ownerDocument.body;
		return Math.max( html[scroll], body[scroll] ) 
			 - Math.min( html[size]  , body[size]   );			
	};
	function both( val ){
		return typeof val == 'object' ? val : { top:val, left:val };
	};
})( jQuery );