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/*
 * Stellar.js v0.6.2
 * http://markdalgleish.com/projects/stellar.js
 *
 * Copyright 2014, Mark Dalgleish
 * This content is released under the MIT license
 * http://markdalgleish.mit-license.org
 */
(function(f,k,m,d){var j="stellar",e={scrollProperty:"scroll",positionProperty:"position",horizontalScrolling:true,verticalScrolling:true,horizontalOffset:0,verticalOffset:0,responsive:false,parallaxBackgrounds:true,parallaxElements:true,hideDistantElements:true,hideElement:function(p){p.hide()},showElement:function(p){p.show()}},g={scroll:{getLeft:function(p){return p.scrollLeft()},setLeft:function(p,q){p.scrollLeft(q)},getTop:function(p){return p.scrollTop()},setTop:function(p,q){p.scrollTop(q)}},position:{getLeft:function(p){return parseInt(p.css("left"),10)*-1},getTop:function(p){return parseInt(p.css("top"),10)*-1}},margin:{getLeft:function(p){return parseInt(p.css("margin-left"),10)*-1},getTop:function(p){return parseInt(p.css("margin-top"),10)*-1}},transform:{getLeft:function(q){var p=getComputedStyle(q[0])[i];return(p!=="none"?parseInt(p.match(/(-?[0-9]+)/g)[4],10)*-1:0)},getTop:function(q){var p=getComputedStyle(q[0])[i];return(p!=="none"?parseInt(p.match(/(-?[0-9]+)/g)[5],10)*-1:0)}}},l={position:{setLeft:function(p,q){p.css("left",q)},setTop:function(p,q){p.css("top",q)}},transform:{setPosition:function(r,t,q,s,p){r[0].style[i]="translate3d("+(t-q)+"px, "+(s-p)+"px, 0)"}}},a=(function(){var r=/^(Moz|Webkit|Khtml|O|ms|Icab)(?=[A-Z])/,p=f("script")[0].style,q="",s;for(s in p){if(r.test(s)){q=s.match(r)[0];break}}if("WebkitOpacity" in p){q="Webkit"}if("KhtmlOpacity" in p){q="Khtml"}return function(t){return q+(q.length>0?t.charAt(0).toUpperCase()+t.slice(1):t)}}()),i=a("transform"),c=f("<div />",{style:"background:#fff"}).css("background-position-x")!==d,b=(c?function(q,p,r){q.css({"background-position-x":p,"background-position-y":r})}:function(q,p,r){q.css("background-position",p+" "+r)}),h=(c?function(p){return[p.css("background-position-x"),p.css("background-position-y")]}:function(p){return p.css("background-position").split(" ")}),n=(k.requestAnimationFrame||k.webkitRequestAnimationFrame||k.mozRequestAnimationFrame||k.oRequestAnimationFrame||k.msRequestAnimationFrame||function(p){setTimeout(p,1000/60)});function o(q,p){this.element=q;this.options=f.extend({},e,p);this._defaults=e;this._name=j;this.init()}o.prototype={init:function(){this.options.name=j+"_"+Math.floor(Math.random()*1000000000);this._defineElements();this._defineGetters();this._defineSetters();this._handleWindowLoadAndResize();this._detectViewport();this.refresh({firstLoad:true});if(this.options.scrollProperty==="scroll"){this._handleScrollEvent()}else{this._startAnimationLoop()}},_defineElements:function(){if(this.element===m.body){this.element=k}this.$scrollElement=f(this.element);this.$element=(this.element===k?f("body"):this.$scrollElement);this.$viewportElement=(this.options.viewportElement!==d?f(this.options.viewportElement):(this.$scrollElement[0]===k||this.options.scrollProperty==="scroll"?this.$scrollElement:this.$scrollElement.parent()))},_defineGetters:function(){var p=this,q=g[p.options.scrollProperty];this._getScrollLeft=function(){return q.getLeft(p.$scrollElement)};this._getScrollTop=function(){return q.getTop(p.$scrollElement)}},_defineSetters:function(){var p=this,s=g[p.options.scrollProperty],q=l[p.options.positionProperty],r=s.setLeft,t=s.setTop;this._setScrollLeft=(typeof r==="function"?function(u){r(p.$scrollElement,u)}:f.noop);this._setScrollTop=(typeof t==="function"?function(u){t(p.$scrollElement,u)}:f.noop);this._setPosition=q.setPosition||function(w,y,v,x,u){if(p.options.horizontalScrolling){q.setLeft(w,y,v)}if(p.options.verticalScrolling){q.setTop(w,x,u)}}},_handleWindowLoadAndResize:function(){var p=this,q=f(k);if(p.options.responsive){q.bind("load."+this.name,function(){p.refresh()})}q.bind("resize."+this.name,function(){p._detectViewport();if(p.options.responsive){p.refresh()}})},refresh:function(r){var q=this,s=q._getScrollLeft(),p=q._getScrollTop();if(!r||!r.firstLoad){this._reset()}this._setScrollLeft(0);this._setScrollTop(0);this._setOffsets();this._findParticles();this._findBackgrounds();if(r&&r.firstLoad&&/WebKit/.test(navigator.userAgent)){f(k).load(function(){var u=q._getScrollLeft(),t=q._getScrollTop();q._setScrollLeft(u+1);q._setScrollTop(t+1);q._setScrollLeft(u);q._setScrollTop(t)})}this._setScrollLeft(s);this._setScrollTop(p)},_detectViewport:function(){var q=this.$viewportElement.offset(),p=q!==null&&q!==d;this.viewportWidth=this.$viewportElement.width();this.viewportHeight=this.$viewportElement.height();this.viewportOffsetTop=(p?q.top:0);this.viewportOffsetLeft=(p?q.left:0)},_findParticles:function(){var p=this,s=this._getScrollLeft(),r=this._getScrollTop();if(this.particles!==d){for(var q=this.particles.length-1;q>=0;q--){this.particles[q].$element.data("stellar-elementIsActive",d)}}this.particles=[];if(!this.options.parallaxElements){return}this.$element.find("[data-stellar-ratio]").each(function(A){var E=f(this),C,H,u,D,z,t,G,y,w,B=0,F=0,v=0,x=0;if(!E.data("stellar-elementIsActive")){E.data("stellar-elementIsActive",this)}else{if(E.data("stellar-elementIsActive")!==this){return}}p.options.showElement(E);if(!E.data("stellar-startingLeft")){E.data("stellar-startingLeft",E.css("left"));E.data("stellar-startingTop",E.css("top"))}else{E.css("left",E.data("stellar-startingLeft"));E.css("top",E.data("stellar-startingTop"))}u=E.position().left;D=E.position().top;z=(E.css("margin-left")==="auto")?0:parseInt(E.css("margin-left"),10);t=(E.css("margin-top")==="auto")?0:parseInt(E.css("margin-top"),10);y=E.offset().left-z;w=E.offset().top-t;E.parents().each(function(){var I=f(this);if(I.data("stellar-offset-parent")===true){B=v;F=x;G=I;return false}else{v+=I.position().left;x+=I.position().top}});C=(E.data("stellar-horizontal-offset")!==d?E.data("stellar-horizontal-offset"):(G!==d&&G.data("stellar-horizontal-offset")!==d?G.data("stellar-horizontal-offset"):p.horizontalOffset));H=(E.data("stellar-vertical-offset")!==d?E.data("stellar-vertical-offset"):(G!==d&&G.data("stellar-vertical-offset")!==d?G.data("stellar-vertical-offset"):p.verticalOffset));p.particles.push({$element:E,$offsetParent:G,isFixed:E.css("position")==="fixed",horizontalOffset:C,verticalOffset:H,startingPositionLeft:u,startingPositionTop:D,startingOffsetLeft:y,startingOffsetTop:w,parentOffsetLeft:B,parentOffsetTop:F,stellarRatio:(E.data("stellar-ratio")!==d?E.data("stellar-ratio"):1),width:E.outerWidth(true),height:E.outerHeight(true),isHidden:false})})},_findBackgrounds:function(){var p=this,s=this._getScrollLeft(),r=this._getScrollTop(),q;this.backgrounds=[];if(!this.options.parallaxBackgrounds){return}q=this.$element.find("[data-stellar-background-ratio]");if(this.$element.data("stellar-background-ratio")){q=q.add(this.$element)}q.each(function(){var E=f(this),u=h(E),C,H,v,D,A,t,z,x,G,B=0,F=0,w=0,y=0;if(!E.data("stellar-backgroundIsActive")){E.data("stellar-backgroundIsActive",this)}else{if(E.data("stellar-backgroundIsActive")!==this){return}}if(!E.data("stellar-backgroundStartingLeft")){E.data("stellar-backgroundStartingLeft",u[0]);E.data("stellar-backgroundStartingTop",u[1])}else{b(E,E.data("stellar-backgroundStartingLeft"),E.data("stellar-backgroundStartingTop"))}A=(E.css("margin-left")==="auto")?0:parseInt(E.css("margin-left"),10);t=(E.css("margin-top")==="auto")?0:parseInt(E.css("margin-top"),10);z=E.offset().left-A-s;x=E.offset().top-t-r;E.parents().each(function(){var I=f(this);if(I.data("stellar-offset-parent")===true){B=w;F=y;G=I;return false}else{w+=I.position().left;y+=I.position().top}});C=(E.data("stellar-horizontal-offset")!==d?E.data("stellar-horizontal-offset"):(G!==d&&G.data("stellar-horizontal-offset")!==d?G.data("stellar-horizontal-offset"):p.horizontalOffset));H=(E.data("stellar-vertical-offset")!==d?E.data("stellar-vertical-offset"):(G!==d&&G.data("stellar-vertical-offset")!==d?G.data("stellar-vertical-offset"):p.verticalOffset));p.backgrounds.push({$element:E,$offsetParent:G,isFixed:E.css("background-attachment")==="fixed",horizontalOffset:C,verticalOffset:H,startingValueLeft:u[0],startingValueTop:u[1],startingBackgroundPositionLeft:(isNaN(parseInt(u[0],10))?0:parseInt(u[0],10)),startingBackgroundPositionTop:(isNaN(parseInt(u[1],10))?0:parseInt(u[1],10)),startingPositionLeft:E.position().left,startingPositionTop:E.position().top,startingOffsetLeft:z,startingOffsetTop:x,parentOffsetLeft:B,parentOffsetTop:F,stellarRatio:(E.data("stellar-background-ratio")===d?1:E.data("stellar-background-ratio"))})})},_reset:function(){var t,s,r,q,p;for(p=this.particles.length-1;p>=0;p--){t=this.particles[p];s=t.$element.data("stellar-startingLeft");r=t.$element.data("stellar-startingTop");this._setPosition(t.$element,s,s,r,r);this.options.showElement(t.$element);t.$element.data("stellar-startingLeft",null).data("stellar-elementIsActive",null).data("stellar-backgroundIsActive",null)}for(p=this.backgrounds.length-1;p>=0;p--){q=this.backgrounds[p];q.$element.data("stellar-backgroundStartingLeft",null).data("stellar-backgroundStartingTop",null);b(q.$element,q.startingValueLeft,q.startingValueTop)}},destroy:function(){this._reset();this.$scrollElement.unbind("resize."+this.name).unbind("scroll."+this.name);this._animationLoop=f.noop;f(k).unbind("load."+this.name).unbind("resize."+this.name)},_setOffsets:function(){var p=this,q=f(k);q.unbind("resize.horizontal-"+this.name).unbind("resize.vertical-"+this.name);if(typeof this.options.horizontalOffset==="function"){this.horizontalOffset=this.options.horizontalOffset();q.bind("resize.horizontal-"+this.name,function(){p.horizontalOffset=p.options.horizontalOffset()})}else{this.horizontalOffset=this.options.horizontalOffset}if(typeof this.options.verticalOffset==="function"){this.verticalOffset=this.options.verticalOffset();q.bind("resize.vertical-"+this.name,function(){p.verticalOffset=p.options.verticalOffset()})}else{this.verticalOffset=this.options.verticalOffset}},_repositionElements:function(){var v=this._getScrollLeft(),s=this._getScrollTop(),A,E,z,D,q,C,w,u=true,p=true,y,B,t,r,x;if(this.currentScrollLeft===v&&this.currentScrollTop===s&&this.currentWidth===this.viewportWidth&&this.currentHeight===this.viewportHeight){return}else{this.currentScrollLeft=v;this.currentScrollTop=s;this.currentWidth=this.viewportWidth;this.currentHeight=this.viewportHeight}for(x=this.particles.length-1;x>=0;x--){z=this.particles[x];D=(z.isFixed?1:0);if(this.options.horizontalScrolling){y=(v+z.horizontalOffset+this.viewportOffsetLeft+z.startingPositionLeft-z.startingOffsetLeft+z.parentOffsetLeft)*-(z.stellarRatio+D-1)+z.startingPositionLeft;t=y-z.startingPositionLeft+z.startingOffsetLeft}else{y=z.startingPositionLeft;t=z.startingOffsetLeft}if(this.options.verticalScrolling){B=(s+z.verticalOffset+this.viewportOffsetTop+z.startingPositionTop-z.startingOffsetTop+z.parentOffsetTop)*-(z.stellarRatio+D-1)+z.startingPositionTop;r=B-z.startingPositionTop+z.startingOffsetTop}else{B=z.startingPositionTop;r=z.startingOffsetTop}if(this.options.hideDistantElements){p=!this.options.horizontalScrolling||t+z.width>(z.isFixed?0:v)&&t<(z.isFixed?0:v)+this.viewportWidth+this.viewportOffsetLeft;u=!this.options.verticalScrolling||r+z.height>(z.isFixed?0:s)&&r<(z.isFixed?0:s)+this.viewportHeight+this.viewportOffsetTop}if(p&&u){if(z.isHidden){this.options.showElement(z.$element);z.isHidden=false}this._setPosition(z.$element,y,z.startingPositionLeft,B,z.startingPositionTop)}else{if(!z.isHidden){this.options.hideElement(z.$element);z.isHidden=true}}}for(x=this.backgrounds.length-1;x>=0;x--){q=this.backgrounds[x];D=(q.isFixed?0:1);C=(this.options.horizontalScrolling?(v+q.horizontalOffset-this.viewportOffsetLeft-q.startingOffsetLeft+q.parentOffsetLeft-q.startingBackgroundPositionLeft)*(D-q.stellarRatio)+"px":q.startingValueLeft);w=(this.options.verticalScrolling?(s+q.verticalOffset-this.viewportOffsetTop-q.startingOffsetTop+q.parentOffsetTop-q.startingBackgroundPositionTop)*(D-q.stellarRatio)+"px":q.startingValueTop);b(q.$element,C,w)}},_handleScrollEvent:function(){var q=this,r=false;var s=function(){q._repositionElements();r=false};var p=function(){if(!r){n(s);r=true}};this.$scrollElement.bind("scroll."+this.name,p);p()},_startAnimationLoop:function(){var p=this;this._animationLoop=function(){n(p._animationLoop);p._repositionElements()};this._animationLoop()}};f.fn[j]=function(q){var p=arguments;if(q===d||typeof q==="object"){return this.each(function(){if(!f.data(this,"plugin_"+j)){f.data(this,"plugin_"+j,new o(this,q))}})}else{if(typeof q==="string"&&q[0]!=="_"&&q!=="init"){return this.each(function(){var r=f.data(this,"plugin_"+j);if(r instanceof o&&typeof r[q]==="function"){r[q].apply(r,Array.prototype.slice.call(p,1))}if(q==="destroy"){f.data(this,"plugin_"+j,null)}})}}};f[j]=function(p){var q=f(k);return q.stellar.apply(q,Array.prototype.slice.call(arguments,0))};f[j].scrollProperty=g;f[j].positionProperty=l;k.Stellar=o}(jQuery,this,document));
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