(function(){"use strict";function _destroy(){_off(message,_postMessage);delete win[obj]}function _close(event){if(!currentframe)return;currentframe.parentNode.removeChild(currentframe);_off(popstate,_close);if(event&&event.type!=popstate)history.back();open=false}function _do_button(button,i){var data=button.dataset,label=button.innerHTML,href=button.getAttribute("href"),iframe,src;data.button=i+1;data.label=label;data.origin=_getOrigin(location.href);data.referer=location.href;src=href+"&"+_buildQuery(data);iframe=_getiframe("width:0px;height:24px;");iframe.src=src;button.innerHTML="";button.parentNode.replaceChild(iframe,button);return{element:button,iframe:iframe}}function _postMessage(e){if(typeof e.data!="string")return;var req=e.data.split("|");if(req[0]!="mailster")return;switch(req[1]){case"d":var iframe=buttons[req[4]-1].iframe;iframe.style.width=req[2]+"px";iframe.style.height=req[3]+"px";break;case"s":if(open)break;var iframe=_getiframe("left:0px;top:0px;width:100%;height:100%;z-index:999999;position:fixed !important;",function(){buttons[req[4]-1].iframe.contentWindow.postMessage("l",req[2]);_on(popstate,_close);history.pushState(is_null,is_null,location.href)});iframe.src=req[2];doc.getElementsByTagName("body")[0].appendChild(iframe);currentframe=iframe;open=true;break;case"c":_close();break}}function _getiframe(css,callback){var el=doc.createElement("iframe");el[setAttribute]("frameBorder","0");el[setAttribute]("allowtransparency","true");el[setAttribute]("scrolling","no");el.style.cssText=iframeCSS+css;el.onload=function(){el.style.visibility="visible";callback&&callback()};return el}function _getOrigin(url){var path=url.split("/");return path[0]+"//"+path[2]}function _buildQuery(obj,num_prefix,temp_key){var output_string=[],o;Object.keys(obj).forEach(function(val){var key=val;num_prefix&&!isNaN(key)?key=num_prefix+key:"";var key=encodeURIComponent(key.replace(/[!'()*]/g,escape));temp_key?key=temp_key+"["+key+"]":"";if(typeof obj[val]==="object"){var query=build_query(obj[val],is_null,key);output_string.push(query)}else{var value=encodeURIComponent(obj[val].replace(/[!'()*]/g,escape));if(value=="true")value="1";if(value=="false")value="0";(o=val.match(/^user([A-Z].*)/))?output_string.push("userdata["+o[1].toLowerCase()+"]="+value):output_string.push(key+"="+value)}});return output_string.join("&")}function _on(type,listener,use_capture){win.addEventListener?win.addEventListener(type,listener,!!use_capture):win.attachEvent("on"+type,listener)}function _off(type,listener){win.removeEventListener?win.removeEventListener(type,listener):win.detachEvent("on"+type,listener)}var win=window,doc=document,obj="MailsterSubscribe",is_null=null,selector=".mailster-subscribe-button",buttonsObj=doc.querySelectorAll(selector),currentframe,setAttribute="setAttribute",message="message",popstate="popstate",iframeCSS="border:0;overflow:hidden;visibility:hidden;display:inline-block;margin:0px !important;padding:0px !important;background:transparent;",open=false,buttons=[],i;if(win[obj].loaded)return;for(i=buttonsObj.length-1;i>=0;i--){buttons[i]=_do_button(buttonsObj[i],i)}_on(message,_postMessage);win[obj]={loaded:true,destroy:_destroy,close:_close}})();