(function(jQuery){var jQuerywindow=jQuery(window);var windowHeight=jQuerywindow.height();jQuerywindow.resize(function(){windowHeight=jQuerywindow.height();});jQuery.fn.parallax=function(xpos,speedFactor,outerHeight){var jQuerythis=jQuery(this);var getHeight;var firstTop;var paddingTop=0;jQuerythis.each(function(){firstTop=jQuerythis.offset().top;});if(outerHeight){getHeight=function(jqo){return jqo.outerHeight(true);};}else{getHeight=function(jqo){return jqo.height();};}
if(arguments.length<1||xpos===null)xpos="50%";if(arguments.length<2||speedFactor===null)speedFactor=0.1;if(arguments.length<3||outerHeight===null)outerHeight=true;function update(){var pos=jQuerywindow.scrollTop();jQuerythis.each(function(){var jQueryelement=jQuery(this);var top=jQueryelement.offset().top;var height=getHeight(jQueryelement);if(top+height<pos||top>pos+windowHeight){return;}
jQuerythis.css('backgroundPosition',xpos+" "+Math.round((top-pos)*speedFactor)+"px");});}
jQuerywindow.bind('scroll',update).resize(update);update();};})(jQuery);