/**
 * @author Alexander Farkas
 * v. 1.21
 */

(function($) {
    if(!document.defaultView || !document.defaultView.getComputedStyle){ // IE6-IE8
        var oldCurCSS = jQuery.curCSS;
        jQuery.curCSS = function(elem, name, force){
            if(name === 'background-position'){
                name = 'backgroundPosition';
            }
            if(name !== 'backgroundPosition' || !elem.currentStyle || elem.currentStyle[ name ]){
                return oldCurCSS.apply(this, arguments);
            }
            var style = elem.style;
            if ( !force && style && style[ name ] ){
                return style[ name ];
            }
            return oldCurCSS(elem, 'backgroundPositionX', force) +' '+ oldCurCSS(elem, 'backgroundPositionY', force);
        };
    }

    var oldAnim = $.fn.animate;
    $.fn.animate = function(prop){
        if('background-position' in prop){
            prop.backgroundPosition = prop['background-position'];
            delete prop['background-position'];
        }
        if('backgroundPosition' in prop){
            prop.backgroundPosition = '('+ prop.backgroundPosition;
        }
        return oldAnim.apply(this, arguments);
    };

    function toArray(strg){
        strg = strg.replace(/left|top/g,'0px');
        strg = strg.replace(/right|bottom/g,'100%');
        strg = strg.replace(/([0-9\.]+)(\s|\)|$)/g,"$1px$2");
        var res = strg.match(/(-?[0-9\.]+)(px|\%|em|pt)\s(-?[0-9\.]+)(px|\%|em|pt)/);
        return [parseFloat(res[1],10),res[2],parseFloat(res[3],10),res[4]];
    }

    $.fx.step. backgroundPosition = function(fx) {
        if (!fx.bgPosReady) {
            var start = $.curCSS(fx.elem,'backgroundPosition');

            if(!start){//FF2 no inline-style fallback
                start = '0px 0px';
            }

            start = toArray(start);

            fx.start = [start[0],start[2]];

            var end = toArray(fx.options.curAnim.backgroundPosition);
            fx.end = [end[0],end[2]];

            fx.unit = [end[1],end[3]];
            fx.bgPosReady = true;
        }
        //return;
        var nowPosX = [];
        nowPosX[0] = ((fx.end[0] - fx.start[0]) * fx.pos) + fx.start[0] + fx.unit[0];
        nowPosX[1] = ((fx.end[1] - fx.start[1]) * fx.pos) + fx.start[1] + fx.unit[1];           
        fx.elem.style.backgroundPosition = nowPosX[0]+' '+nowPosX[1];

    };
})(jQuery);

/*
* hoverFlow - A Solution to Animation Queue Buildup in jQuery
* Version 1.00
*
* Copyright (c) 2009 Ralf Stoltze, http://www.2meter3.de/code/hoverFlow/
* Dual-licensed under the MIT and GPL licenses.
* http://www.opensource.org/licenses/mit-license.php
* http://www.gnu.org/licenses/gpl.html
*/
(function($) {
	$.fn.hoverFlow = function(type, prop, speed, easing, callback) {
		// only allow hover events
		if ($.inArray(type, ['mouseover', 'mouseenter', 'mouseout', 'mouseleave']) == -1) {
			return this;
		}
	
		// build animation options object from arguments
		// based on internal speed function from jQuery core
		var opt = typeof speed === 'object' ? speed : {
			complete: callback || !callback && easing || $.isFunction(speed) && speed,
			duration: speed,
			easing: callback && easing || easing && !$.isFunction(easing) && easing
		};
		
		// run immediately
		opt.queue = false;
			
		// wrap original callback and add dequeue
		var origCallback = opt.complete;
		opt.complete = function() {
			// execute next function in queue
			$(this).dequeue();
			// execute original callback
			if ($.isFunction(origCallback)) {
				origCallback.call(this);
			}
		};
		
		// keep the chain intact
		return this.each(function() {
			var $this = $(this);
		
			// set flag when mouse is over element
			if (type == 'mouseover' || type == 'mouseenter') {
				$this.data('jQuery.hoverFlow', true);
			} else {
				$this.removeData('jQuery.hoverFlow');
			}
			
			// enqueue function
			$this.queue(function() {				
				// check mouse position at runtime
				var condition = (type == 'mouseover' || type == 'mouseenter') ?
					// read: true if mouse is over element
					$this.data('jQuery.hoverFlow') !== undefined :
					// read: true if mouse is _not_ over element
					$this.data('jQuery.hoverFlow') === undefined;
					
				// only execute animation if condition is met, which is:
				// - only run mouseover animation if mouse _is_ currently over the element
				// - only run mouseout animation if the mouse is currently _not_ over the element
				if(condition) {
					$this.animate(prop, opt);
				// else, clear queue, since there's nothing more to do
				} else {
					$this.queue([]);
				}
			});

		});
	};
})(jQuery);