/*

Author - Rudolf Naprstek
Website - http://www.thimbleopensource.com/tutorials-snippets/jquery-plugin-filter-text-input
Version - 1.2.0
Release - 20th November 2010

Thanks to Niko Halink from ARGH!media for bugfix!

*/

(function ($) {

    $.fn.extend({

        filter_input: function (options) {

            var defaults = {
                regex: ".*",
                live: false
            }

            var options = $.extend(defaults, options);
            var regex = new RegExp(options.regex);

            function filter_input_function(event) {

                var key = event.charCode ? event.charCode : event.keyCode ? event.keyCode : 0;

                // 8 = backspace, 9 = tab, 13 = enter, 35 = end, 36 = home, 37 = left, 39 = right, 46 = delete
                if (key == 8 || key == 9 || key == 13 || key == 35 || key == 36 || key == 37 || key == 39 || key == 46) {

                    if ($.browser.mozilla) {

                        // if charCode = key & keyCode = 0
                        // 35 = #, 36 = $, 37 = %, 39 = ', 46 = .

                        if (event.charCode == 0 && event.keyCode == key) {
                            return true;
                        }

                    }
                }


                var string = String.fromCharCode(key);
                if (regex.test(string)) {
                    return true;
                }
                return false;
            }

            if (options.live) {
                $(this).live('keypress', filter_input_function);
            } else {
                return this.each(function () {
                    var input = $(this);
                    input.unbind('keypress').keypress(filter_input_function);
                });
            }

        }
    });

});