Actionscript 3.0 Autocomplete For Textfields (free)

/*
 * Instructions:
 *
 * Just copy the 'textFields' Object and the addAutoComplete() function in your code, and call it
 * passing as arguments the textfield and a list of keywords to match (Object, Array or Vector.<int or String>).
 *
 * E.g:
 *
 * addAutoComplete(txt1, new <int>[12311, 1232, 1233]);
 * addAutoComplete(txt2, new <String>["Angel", "Annie", "Animals"]);
 * addAutoComplete(txt3, ["Angel", "Annie", "Animals"]);
 * addAutoComplete(txt4, {"1":Angel", "2":"Annie", "3":"Animals"});
 *
 */

 //textFields
 var textFields:Object = {};

//addAutoComplete
function addAutoComplete(textField:TextField, keywords:Object):void{
    textFields[textField.name] = {"textField": textField, "keywords": keywords};

    //Create new container of type TextField to append the results
    //and set its appearance and size according to the textfield's size.
    textFields[textField.name].container = new TextField();
    textFields[textField.name].container.autoSize = "center";
    textFields[textField.name].container.defaultTextFormat = new TextFormat("Verdana", 13, 0, null, null, null, null, null, "center");
    textFields[textField.name].container.multiline = true;
    textFields[textField.name].container.wordWrap = true;
    textFields[textField.name].container.border = true;
    textFields[textField.name].container.borderColor = 0x999999;
    textFields[textField.name].container.width = textField.width;
    textFields[textField.name].container.y = textField.y + textField.height;
    textFields[textField.name].container.x = textField.x;

    //Declare event listeners callbacks

    //onLink
    textFields[textField.name].onLink = function(event:TextEvent):void{
        //Split the string from the clicked hyperlink by its "&" symbols
        //to get all the key/value pairs available.
        var parse:Array = event.text.split("&");
        var obj:Object = {};

        //Get the keys and values and add them to obj Object.
        for (var i:String in parse)
        {
            var o:Array = parse[i].split("=");
            var key:String = o[0];
            var value:String = o[1];
            obj[key] = value;
        }
        var txt:TextField = textFields[obj.textField].textField;
        //Remove the container
        var container:TextField = textFields[txt.name].container;
        if (contains(container)) removeChild(container);
        //Add the clicked hyperlink text to the actual textfield
        txt.text = obj.clickedItem;
    };
    //onChange
    textFields[textField.name].onChange = function(event:Event):void{
        var txt:TextField = event.currentTarget as TextField;
        var obj:Object = textFields[txt.name];
        var container:TextField = obj.container as TextField;
        //If typed text length is higher than 1 character,
        if (txt.length > 1){
            var results:Array = [];

            //Iterate through the keywords to match
            for (var i:String in obj.keywords){
                var result:String = String(obj.keywords[i]);
                var query:String = String(txt.text);

                //If there is a match with the typed text,
                if (result.toLowerCase().indexOf(query.toLowerCase()) >= 0){
                    //append the match to the results array.
                    results.push(result);
                }
                //Garbage collection
                result = query = null;
            }
            //Check if there are results.
            if (results.length > 0){
                //Add the container to the stage if it's not already added.
                if (!contains(container)) addChild(container);
                //Set the width of the container to the textfield's width, in case it changed.
                container.width = textField.width;
                //Clear the container
                container.htmlText = "";
                //Iterate through all the results.
                for (var j:String in results){
                    //Append the current result as hyperlink HTML text to the texfield.
                    container.htmlText += "<a href=\"event:"+"textField="+txt.name+"&clickedItem="+results[j]+"\">"+results[j]+" </a></br > ";
                }
                //Garbage collection
                results = null;
            } else{
                if(contains(container)) removeChild(container);
            }
        //else, clear and remove the container from the stage.
        } else{
            container.htmlText = "";
            if(contains(container)) removeChild(container);
        }
    };
    //Add event listeners
    textFields[textField.name].container.addEventListener(TextEvent.LINK, textFields[textField.name].onLink);
    textField.addEventListener(Event.CHANGE, textFields[textField.name].onChange);
};
//End addAutoComplete