Update to Chad Killingsworth's TinyMCE plugin that strips markup before character count.

tinymce-character-count.js

(function () {
   tinymce.create("tinymce.plugins.HTMLCharCount", {
       _MaxLength: 0, _CharsString: "", _RemainString: "", init: function (a, b) {
           var c = this; c._MaxLength = a.getParam("htmlcharcount_maxchars", 0);
           if (a.getParam("theme", "") != "advanced") {
               return
           }
           c._CharsString = " " + a.getLang("htmlcharcount.chars", "Characters");
           c._RemainString = " " + a.getLang("htmlcharcount.remaining", "Characters remaining");
           a.onPostRender.add(function (e, d) {
               var f = document.getElementById(e.id + "_path_row").parentNode; tinymce.DOM.add(f, "div", {
                   style: "float: right", id: e.id + "_charCounter"
               },
               "")
           });
           a.onNodeChange.add(c._updateCount, c);
           a.onKeyUp.add(c._updateCount, c)
       },
       _updateCount: function (a, b) {
           document.getElementById(a.id + "_charCounter").innerHTML = this._getPluginContent(a)
       },
       _getPluginContent: function (b) {
           var a = b.getContent().length;
           // The following thows off syntax highlighting tools, but it is valid
           var myStrippedContent = b.getContent().replace(/<.[^<>]*?>/g, "").replace(/&[^;]+;/g, "?");
           var myLength = myStrippedContent.length;
           // console.log(myStrippedContent);
           // console.log(myLength);
           if (this._MaxLength < 1) {
               return myLength + this._CharsString
           }
           if (this._MaxLength > myLength) {
               return (this._MaxLength - myLength) + this._RemainString
           }
           return "<span style='color: red'>" +(this._MaxLength - myLength) + this._RemainString + "</span>"
       },
       getInfo: function () {
           return {
               longname: "HTML Character Counter plugin", author: "Chad Killingsworth, Missouri State University, Modified by Dan McCreary and Ann Kelly", authorurl: "http://www.missouristate.edu/web/", version: "1.0"
           }
       }
   });
   tinymce.PluginManager.add("htmlcharcount", tinymce.plugins.HTMLCharCount)
})();

Hi, I really need to use this plugin but I'm don't know how?
Can you explain to me how to use it? (sorry, but my english is not so good).
Thank you.