Get Array of words and non words from a string

/*
************************************************************
Developed by R.Arul Kumaran [arul@shockwave-india.com]     *
for more code keep visiting [www.shockwave-india.com/blog] *
************************************************************
*/
//getWords returns Array of words and non words from a string

//gets the words in to array elements
_global.getWords = function(txt) {
        var Arr = new Array();
        var lastIndex = 0;
        for (var i = 0; i<txt.length; i++) {
                var code = txt.charCodeAt(i);
                var char = txt.charAt(i);
                if (isWord(code)) {
                        //trace(" '"+char+"' "+"isWord");
                } else {
                        //trace(" '"+char+"' "+"is Not Word");
                        var word = txt.substring(lastIndex, i);
                        if (word == '') {
                                /*
                                empty string that means
                                we have 2 or more non word chars together
                                so add them together
                                */
                                if (Arr.length != 0) {
                                        Arr[Arr.length-1] = Arr[Arr.length-1]+char;
                                } else {
                                        Arr.push('');
                                        Arr.push(char);
                                }
                        } else {
                                Arr.push(word);
                                Arr.push(char);
                        }
                        lastIndex = i+1;
                }
        }
        if (lastIndex != txt.length) {
                //last char is not a non-word so add the lost word to list
                word = txt.substring(lastIndex, txt.length);
                Arr.push(word);
                Arr.push('');
        }
        trace(Arr.length);
        return Arr;
}

_global.isWord = function(c) {
        /*
        Charcode range for non word chars
        9,10,13
        32 to 47
        58 to 64
        91 to 96
        123 to 126
        */
        //trace(c);
        if (c == 10 || c == 9 || c == 13 || (c>=32 && c<=44) || (c>=46 && c<=47) ||
        (c>=58 && c<=64) || (c>=91 && c<=96) || (c>=123 && c<=126)) {
                return false;
        } else {
                return true;
        }
}
//HTML Encodes the char
_global.htmlEncode = function(chr) {
        switch (chr) {
                case ' ' :
                chr = " ";
                break;
                case '<' :
                chr = "<";
                break;
                case '>' :
                chr = ">";
                break;
                case '&' :
                chr = "&amp;";
                break;
                case '\"' :
                chr = """;
                break;
                case "'" :
                chr = "&apos;";
                break;
        }
        return chr;
}
/*
Usage:-
txt="Huh! Multimedia?"
//get the words array
wordsArr=getWords(txt);
//wordsArr now contatins ["Huh", "! ", "Multimedia", "?"]
//in which first element is the word and second is the nonword and so on
*/