(function () {
	'use strict';

	var mailster = 'mailster',
		btn = document.getElementsByClassName('btn')[0],
		widget = document.getElementsByClassName('btn-widget')[0],
		button_id,
		origin,
		form_id,
		loc;

	btn.onclick = function () {
		widget.className = widget.className.replace(
			'btn-widget',
			'btn-widget init'
		);
		loc = location.href.replace(/&button=\d+/, '&iframe=1');
		window.parent.postMessage(
			[mailster, 's', loc, form_id, button_id].join('|'),
			origin
		);
	};
	window.onload = function () {
		window.parent.postMessage(
			[mailster, 'd', widget.offsetWidth, widget.offsetHeight, button_id].join(
				'|'
			),
			origin
		);
	};
	window.onmessage = function (event) {
		if (event.data == 'l')
			widget.className = widget.className.replace(
				'btn-widget init',
				'btn-widget'
			);
	};

	button_id = location.search.match(/button=(\d+)/)[1] || 0;
	origin = decodeURIComponent(location.search.match(/origin=(.+)&/)[1]);
	form_id = location.search.match(/id=(\d+)/)[1] || 1;
})();