(function(window){"use strict";function extend(a,b){for(var key in b){if(b.hasOwnProperty(key)){a[key]=b[key]}}return a}function CBPFWTabs(el,options){this.el=el;this.options=extend({},this.options);extend(this.options,options);this._init()}CBPFWTabs.prototype.options={start:0};CBPFWTabs.prototype._init=function(){this.tabs=[].slice.call(this.el.querySelectorAll("nav > ul > li"));this.items=[].slice.call(this.el.querySelectorAll(".content-wrap > section"));this.current=-1;this._show();this._initEvents()};CBPFWTabs.prototype._initEvents=function(){var self=this;this.tabs.forEach(function(tab,idx){tab.addEventListener("click",function(ev){ev.preventDefault();self._show(idx)})})};CBPFWTabs.prototype._show=function(idx){if(this.current>=0){this.tabs[this.current].className=this.items[this.current].className=""}this.current=idx!=undefined?idx:this.options.start>=0&&this.options.start