/*! jquery-scrollchaser - v0.0.6 - 2013-11-11 */!function(a){"use strict";var b=a(window),c=50,d=function(a,b,c){var d=0;return function(){var e,f;return e=new Date,f=c-(e-d),0>=f?(d=e,a.apply(b,arguments)):void 0}},e=0,f=function(a){var b=(e++).toString();return function(){return this.cache[b]||(this.cache[b]=a.apply(this)),this.cache[b]}},g=function(){function e(c,e){this.$el=c,this.$el.css({width:this.$el.width()}),this.$wrapper=e.wrapper,"static"===this.$wrapper.css("position")&&this.$wrapper.css("position","relative"),this.sentinel=a("<div></div>").css({position:e.ignore?"absolute":"relative",top:0,height:0}),this.$el.before(this.sentinel),this.offsetTop=e.offsetTop||0,this.offsetBottom=e.offsetBottom||0,this.position=e.position||"top",this.ignore=e.ignore,this.ignore&&this.$el.css({position:"absolute",top:0}),this.handler=d("bottom"==this.position?this.onScrollBottom:this.onScrollTop,this,e.throttle||10),b.on("scroll",this.handler),b.on("resize",this.handler),this.handler()}return a.extend(e.prototype,{state:"top",same:!1,onScrollTop:function(){if(this.cache={},!this.ignore&&(this.same||"top"===this.state&&this.isSameHeight()))return this.same=!0,void 0;var a,b=this.getScrollTop()+this.offsetTop;a=b<this.getSentinelTop()?"top":b+this.getOuterHeight()>this.getSentinelBottom()?"bottom":"fixed",(this.state!==a||"fixed"!==a)&&this.transferTo(a)},onScrollBottom:function(){if(this.cache={},!this.ignore&&(this.same||"top"===this.state&&this.isSameHeight()))return this.same=!0,void 0;var a,c;c=this.getScrollTop()+b.height(),a=c>this.getSentinelBottom()?"bottom":c-this.getOuterHeight()<this.getSentinelTop()?"top":"fixed",(this.state!==a||"fixed"!==a)&&this.transferTo(a)},transferTo:function(a){this.state=a;var b;b="top"===this.state?{position:this.ignore?"absolute":"relative",top:0,bottom:""}:"bottom"===this.state?{position:"absolute",top:this.getWrapperHeight()-this.getOuterHeight(),bottom:""}:"bottom"===this.position?{position:"fixed",top:"",bottom:this.offsetBottom}:{position:"fixed",top:this.offsetTop,bottom:""},this.$el.css(b)},isSameHeight:function(){return this.getSentinelBottom()-this.getBottom()-this.offsetBottom<c},getScrollTop:f(function(){return b.scrollTop()}),getWrapperHeight:f(function(){return this.$wrapper.outerHeight()}),getOuterHeight:f(function(){return this.$el.outerHeight(!0)+this.offsetBottom}),getSentinelTop:f(function(){return this.sentinel.offset().top}),getSentinelBottom:f(function(){return this.$wrapper.offset().top+this.getWrapperHeight()+parseInt(this.$wrapper.css("margin-top"),10)}),getBottom:f(function(){return this.$el.offset().top+this.getOuterHeight()}),destroy:function(){this.$el&&(this.transferTo("top"),this.$el=this.$wrapper=null,b.off("scroll",this.handler),b.off("resize",this.handler))}}),e}();a.fn.scrollChaser=function(b){b||(b={}),b.wrapper?b.wrapper instanceof a||(b.wrapper=a(b.wrapper)):b.wrapper=a(document.body),this.scrollChaser=new g(this,b);var c=this,d=this.remove;return this.remove=function(){c.scrollChaser.destroy(),d.apply(c,arguments)},this},a.fn.outerHeight||(a.fn.outerHeight=function(a){var b=this.height();return a||(b-=parseInt(this.css("margin-bottom"),10),b-=parseInt(this.css("margin-top"),10)),b})}(window.jQuery||window.Zepto);
/*
//@ sourceMappingURL=jquery.scrollchaser.min.map
*/