Target TinyMCE instance in WordPress post editor and return an estimated word count

countWordsInWpEditor

function countWordsInWpEditor() {
	var html;
	var text;
	var words;

	var focusedTextField = document.getElementById("tinymce");

	html = focusedTextField.innerHTML;
	text = html.replace(/(<([^>]+)>)/ig,"")
	words = text.split(" ");

	return words.length;
}