A proof of character counter for fck editor 2.x

fck_editor_chr_counter.js

// requires mootools-core bind function

function FCKeditor_OnComplete(editorInstance){

	editorInstance.EditorDocument.addEventListener('keypress', checkCharacters.bind(editorInstance));

}

function checkCharacters(e) {

	var characters = 0;

	var clean_tag = this.GetHTML().replace(/<\/?.*?>|&nbsp;/gi, '');
	var clean_string = clean_tag.replace(/&quot;/gi, ' '); // add more entities

	var add = e.charCode ? 1 : (e.keyCode==46 || e.keyCode==8) ? -1 : 0;

	characters = clean_string.length + add

}