jQuery useful and custom extensions

jquery.extend.js

/**
 * jQuery useful and custom extensions
 */

/**
 * Non ajax plugin as seen in: http://stackoverflow.com/questions/1149454/non-ajax-get-post-using-jquery-plugin
 */
(function(jQuery) {
    $.extend({
        doGet: function(url, params) {
          if(typeof(params) == 'undefined') {
            document.location = url;
          } else {
            document.location = url + '?' + $.param(params);
          }
        },
        doPost: function(url, params) {
            var $form = $("<form>")
                .attr("method", "post")
                .attr("action", url);
            $.each(params, function(name, value) {
                $("<input type='hidden'>")
                    .attr("name", name)
                    .attr("value", value)
                    .appendTo($form);
            });
            $form.appendTo("body");
            $form.submit();
        },
        isUrl: function(s) {
          var regexp = /(ftp|http|https):\/\/(\w+:{0,1}\w*@)?(\S+)(:[0-9]+)?(\/|\/([\w#!:.?+=&%@!\-\/]))?/;
          return regexp.test(s);
        },
        isBlank: function(object) {
            return (
                    ($.isPlainObject(object) && $.isEmptyObject(object)) ||
                    ($.isArray(object) && object.length === 0) ||
                    (typeof(object) == "string" && $.trim(object) === "") ||
                    (!object)
                );
        },
        numberFormat: function (number, decimals, dec_point, thousands_sep) {
            // http://kevin.vanzonneveld.net
            // +   original by: Jonas Raoni Soares Silva (http://www.jsfromhell.com)
            // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
            // +     bugfix by: Michael White (http://getsprink.com)
            // +     bugfix by: Benjamin Lupton
            // +     bugfix by: Allan Jensen (http://www.winternet.no)
            // +    revised by: Jonas Raoni Soares Silva (http://www.jsfromhell.com)
            // +     bugfix by: Howard Yeend
            // +    revised by: Luke Smith (http://lucassmith.name)
            // +     bugfix by: Diogo Resende
            // +     bugfix by: Rival
            // +      input by: Kheang Hok Chin (http://www.distantia.ca/)
            // +   improved by: davook
            // +   improved by: Brett Zamir (http://brett-zamir.me)
            // +      input by: Jay Klehr
            // +   improved by: Brett Zamir (http://brett-zamir.me)
            // +      input by: Amir Habibi (http://www.residence-mixte.com/)
            // +     bugfix by: Brett Zamir (http://brett-zamir.me)
            // +   improved by: Theriault
            // +      input by: Amirouche
            // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
            // *     example 1: number_format(1234.56);
            // *     returns 1: '1,235'
            // *     example 2: number_format(1234.56, 2, ',', ' ');
            // *     returns 2: '1 234,56'
            // *     example 3: number_format(1234.5678, 2, '.', '');
            // *     returns 3: '1234.57'
            // *     example 4: number_format(67, 2, ',', '.');
            // *     returns 4: '67,00'
            // *     example 5: number_format(1000);
            // *     returns 5: '1,000'
            // *     example 6: number_format(67.311, 2);
            // *     returns 6: '67.31'
            // *     example 7: number_format(1000.55, 1);
            // *     returns 7: '1,000.6'
            // *     example 8: number_format(67000, 5, ',', '.');
            // *     returns 8: '67.000,00000'
            // *     example 9: number_format(0.9, 0);
            // *     returns 9: '1'
            // *    example 10: number_format('1.20', 2);
            // *    returns 10: '1.20'
            // *    example 11: number_format('1.20', 4);
            // *    returns 11: '1.2000'
            // *    example 12: number_format('1.2000', 3);
            // *    returns 12: '1.200'
            // *    example 13: number_format('1 000,50', 2, '.', ' ');
            // *    returns 13: '100 050.00'
            // Strip all characters but numerical ones.
            number = (number + '').replace(/[^0-9+\-Ee.]/g, '');
            var n = !isFinite(+number) ? 0 : +number,
                prec = !isFinite(+decimals) ? 0 : Math.abs(decimals),
                sep = (typeof thousands_sep === 'undefined') ? ',' : thousands_sep,
                dec = (typeof dec_point === 'undefined') ? '.' : dec_point,
                s = '',
                toFixedFix = function (n, prec) {
                    var k = Math.pow(10, prec);
                    return '' + Math.round(n * k) / k;
                };
            // Fix for IE parseFloat(0.55).toFixed(0) = 0;
            s = (prec ? toFixedFix(n, prec) : '' + Math.round(n)).split('.');
            if (s[0].length > 3) {
                s[0] = s[0].replace(/\B(?=(?:\d{3})+(?!\d))/g, sep);
            }
            if ((s[1] || '').length < prec) {
                s[1] = s[1] || '';
                s[1] += new Array(prec - s[1].length + 1).join('0');
            }
            return s.join(dec);
        }
    });
})(jQuery);