;;function StickyHeader(scrollable,sticky){'use strict';var headers=scrollable.getElementsByTagName('header');var stickyPosition;var stickyStyle=sticky.style;this._throttledRefresh=function(){var display=false;if(stickyPosition===undefined){stickyPosition=sticky.offsetHeight+sticky.offsetTop;}
for(var i=1,length=headers.length;i<length;i++){if(headers[i].offsetTop-scrollable.scrollTop>stickyPosition){var lookupIndex=1;var header=headers[i-lookupIndex];while(header&&header.offsetHeight===0){lookupIndex++;header=headers[i-lookupIndex];}
stickyStyle.backgroundImage='-moz-element(#'+header.id+')';display=true;break;}}
sticky.classList.toggle('has-content',display);this.throttle=null;}.bind(this);this.refresh=function(){if(!this.throttle){this.throttle=setTimeout(this._throttledRefresh,0);}}.bind(this);scrollable.addEventListener('scroll',this.refresh);}