function Subject() { var _self=this; var _viewers=new Array; this.notify=function(action,opts) { if (_viewers[action]) { var obs=_viewers[action],o=null; for (var i=0;i<obs.length;i++) { ob=obs[i]; if (typeof(ob[action])=="function") ob[action](opts); else alert(action+" not defined"); } } }; this.add_viewer=function(viewer,action) { if (!_viewers[action]) _viewers[action]=new Array; _viewers[action].push(viewer); }; } function Model() { var _self=this; var _category_list=null; var _product_lists=new Array; this.apikey=function() { var x=typeof(gbl_apikey)=="undefined"?0 :gbl_apikey; if (!x) alert("You have to be registered to use these facilities."); return x; }; this.category_list=function(trg) { return _category_list; }; this.product_list=function(trg) { return _product_lists[trg]; }; this.set_category_list=function(list,opts) { _category_list=list; _self.notify("set_category_list",opts.trg); }; this.set_product_list=function(list,opts) { var trg=opts.trg; _product_lists[trg]=list; _self.notify("set_product_list",trg); }; this.get_categories=function(trg) { var apikey=_self.apikey(); if (apikey && !_category_list) { ae.call(gbl_api,{action:"categories","apikey":apikey,"trg":trg},_self.set_category_list); } }; this.get_category_products=function(catid,trg) { var apikey=_self.apikey(); if (apikey && catid) { ae.call(gbl_api,{action:"products","catid":catid,"apikey":apikey,"trg":trg},_self.set_product_list); } }; this.start_search=function(t,trg) { var apikey=_self.apikey(); if (apikey && t) ae.call(gbl_api,{action:"products",search:t,"apikey":apikey,"trg":trg},_self.set_product_list); }; } Model.prototype=new Subject;