var Mobucks=Class.create({initialize:function(url){this.bannerUrl=url;},banner:function(bannerId,elementId,callback){new Ajax.Request(this.bannerUrl,{parameters:{banner:bannerId},method:'get',onSuccess:function(response){$(elementId).update(response.responseText);'function'===typeof callback?callback(response.responseText):'';}.bind(this),onError:function(response){pr(response);}});}});