/*!
* Copyright (c) 2010 Brandon Aaron (http://brandonaaron.net)
* backgroundPosition cssHook for jquery. Necessary to combat different css property names between browsers
* https://github.com/brandonaaron/jquery-cssHooks
* Licensed under the MIT License (LICENSE.txt).
*/
(function($) {
    // backgroundPosition[X,Y] get hooks
    var $div = $('<div style="background-position: 3px 5px">');
    $.support.backgroundPosition = $div.css('backgroundPosition') === "3px 5px" ? true : false;
    $.support.backgroundPositionXY = $div.css('backgroundPositionX') === "3px" ? true : false;
    $div = null;

    var xy = ["X","Y"];

    // helper function to parse out the X and Y values from backgroundPosition
    function parseBgPos(bgPos) {
        var parts = bgPos.split(/\s/),
            values = {
                "X": parts[0],
                "Y": parts[1]
            };
        return values;
    }

    if (!$.support.backgroundPosition && $.support.backgroundPositionXY) {
        $.cssHooks.backgroundPosition = {
            get: function( elem, computed, extra ) {
                return $.map(xy, function( l, i ) {
                    return $.css(elem, "backgroundPosition" + l);
                }).join(" ");
            },
            set: function( elem, value ) {
                $.each(xy, function( i, l ) {
                    var values = parseBgPos(value);
                    elem.style[ "backgroundPosition" + l ] = values[ l ];
                });
            }
        };
    }

    if ($.support.backgroundPosition && !$.support.backgroundPositionXY) {
        $.each(xy, function( i, l ) {
            $.cssHooks[ "backgroundPosition" + l ] = {
                get: function( elem, computed, extra ) {
                    var values = parseBgPos( $.css(elem, "backgroundPosition") );
                    return values[ l ];
                },
                set: function( elem, value ) {
                    var values = parseBgPos( $.css(elem, "backgroundPosition") ),
                        isX = l === "X";
                    elem.style.backgroundPosition = (isX ? value : values[ "X" ]) + " " +
                                                    (isX ? values[ "Y" ] : value);
                }
            };
            $.fx.step[ "backgroundPosition" + l ] = function( fx ) {
                $.cssHooks[ "backgroundPosition" + l ].set( fx.elem, fx.now + fx.unit );
            };
        });
    }
})(jQuery);

/*!
* Scroll-based parallax plugin for jQuery
* Copyright (c) 2011 Dave Cranwell (http://davecranwell.com)
* Licensed under the MIT License.
* 2011-05-18
* version 1.0
*/
(function($){
$.fn.scrollParallax = function(options) {
var settings = {
'speed': 0.2,
'axis': 'y',
'debug': false
}

function debug(msg){
if(settings.debug && 'console' in window && 'log' in window.console){
console.log(msg);
}
}

return this.each(function() {
//defined accessible $this var in standard way for use within functions
var $this = $(this);

//extend options in standard way
if (options) {
$.extend(settings, options);
}

$this.bind('inview', function (event, visible) {
if (visible == true) {
$this.addClass("inview");
debug("in view");
}else{
$this.removeClass("inview");
debug("out of view");
}
});

//find current position so parallax can be relative to it
var currentPosArray=$this.css("backgroundPosition").split(" ");
//var currentXPos=parseInt(currentPosArray[0].replace(/[^0-9\-]/g, ""));
var currentYPos=parseInt(currentPosArray[1].replace(/[^0-9\-]/g, ""));

//recalculate position on scroll
$(window).bind('scroll', function(){
if($this.hasClass("inview")){
var offset = $this.offset();

//calculate new position
if(settings.axis.match(/y/)){
var Ypos = offset.top - $(window).scrollTop();
var newYPos = (-(Ypos) * settings.speed) + currentYPos;
}else{

var newYPos = currentYPos;
}

//debug("new X position: "+ newXPos);
debug("new Y position: "+ newYPos);

$this.css({'backgroundPosition': "center " + parseInt(newYPos) +"px"});
}
});
});
};

})(jQuery);