tinymce.PluginManager.add('typekit', function(editor) {
	editor.on('init', function() {
		var typekitId = editor.settings.typekitId;
	    	// Get the iframe.
	    	var doc = editor.getDoc();
	        // Create the script to inject into the header asynchronously.
        	var jscript = "(function() { var config = { kitId: '"+typekitId+"' }; var d = false, tk = document.createElement('script'); tk.src = '//use.typekit.net/' + config.kitId + '.js'; tk.type = 'text/javascript'; tk.async = 'true'; tk.onload = tk.onreadystatechange = function() { var rs = this.readyState; if (d || rs && rs != 'complete' && rs != 'loaded') return; d = true; try { Typekit.load(config); } catch (e) {} }; var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(tk, s); })();";
	    	// Create a DOM script element and insert the code inside of it.
	    	var script  = doc.createElement("script");
	    	script.type = "text/javascript";
	    	script.appendChild(doc.createTextNode(jscript));

	    	// Append the srcript to the header.
	    	doc.getElementsByTagName('head')[0].appendChild(script);
	});
});