function messengerLoad(){
			var css='iframe#messenger_embedded{position:fixed;bottom:0;right:0;width:370px;border:0;z-index:999999;margin:0 !important;padding:0 !important;}iframe#messenger_embedded.messenger_opened{height:720px;}iframe#messenger_embedded.messenger_closed{height:120px;}@media screen and (max-device-width:768px),screen and (max-device-height:512px){iframe#messenger_embedded.messenger_opened{width:100%;height:100%;}iframe#messenger_embedded.messenger_closed{width:65px;height:65px;}}',
		head=document.head||document.getElementsByTagName('head')[0],
		style=document.createElement('style');
		style.type='text/css';
		style.appendChild(document.createTextNode(css));
		head.appendChild(style);

		var body=document.body||document.getElementsByTagName('body')[0],
		iframe=document.createElement('iframe');
		iframe.allow='geolocation';
		iframe.id='messenger_embedded';
		iframe.src='https://bookingsap.newbook.cloud/messenger/?newbook_api_action=messenger_embedded&messenger_api_key=instances_54b953fc83a999bc1bb8bcdf8ab4ecf0';

		body.appendChild(iframe);
	};

//firefox doesn't fire this event when the DOM is already loaded, but all browsers work for the below
if (document.readyState=="complete")
	messengerLoad();
else
	document.addEventListener('DOMContentLoaded',messengerLoad);


//Add an event listener to receive parameters from outside of the iframe
window.addEventListener('message',function(event){
	if (event.origin=='https://bookingsap.newbook.cloud')
		switch (event.data.message) {
			case 'messenger_opened': document.getElementById('messenger_embedded').className='messenger_opened'; break;
			case 'messenger_closed': document.getElementById('messenger_embedded').className='messenger_closed'; break;
			case 'messenger_inactive': document.getElementById('messenger_embedded').style.display='none'; break;
			case 'messenger_init': resizeMessenger(); break;
		}
});

function controlMessenger(message,parameters){
	if (typeof parameters=='string') {
		var temp=parameters;
		parameters={};
		parameters[message]=temp;
	}
	parameters.message=message;
	document.getElementById('messenger_embedded').contentWindow.postMessage(parameters,'*');
}

function resizeMessenger() {
	controlMessenger('resize',{
		width:window.outerWidth,
		height:window.outerHeight
	});
}

window.addEventListener('orientationchange',resizeMessenger);