(function($) {

    $.extend($, {
        clearwatermarks: function() {
            $("[wmwrap='true']").find("input,textarea").watermark({ remove: true });
        },
        addwatermarks: function() {
            $("[watermark]").each(function(num, el) {
                $(el).watermark($(el).attr("watermark"));
            });
        },
        watermark: function(o) {
            o.el = $(o.el);
            o.html = o.el.attr('watermark');
            if (o.html == null)
                return;

            if (o.bRemovePrev)
                o.el.prev().remove();
            if (o.remove) {
                if (o.el.parent().attr("wmwrap") == 'true') {
                    o.el.parent().replaceWith(o.el);
                }
            } else {
                if (o.el.parent().attr("wmwrap") != 'true') {
                    o.el = o.el.wrap("<span class='field-with-placeholder'/>");
                    var l = $("<label class='placeholder' />");

                    if (o.html) { l.html(o.html); }
                    if (o.cls) { l.addClass(o.cls); }
                    if (o.css) { l.css(o.css); }

                    if (o.el.is("TEXTAREA")) {
                        if ($.browser.msie) {
                            l.css("width", o.el.width());
                        }
                        if ($.browser.mozilla || $.browser.safari) {
                            l.css("top", "");
                        }
                    }

                    var focus = function() {
                        l.addClass('focus');
                    };
                    var keydown = function() {
                        l.hide();
                    }

                    var blur = function() {
                        l.removeClass('focus');
                        if (!o.el.val()) {
                            l.show();
                        } else {
                            l.hide();
                        }
                    };

                    var click = function() {
                        o.el.focus();
                    };

                    if (o.inherit) {
                        if (typeof o.inherit == "string") {
                            l.css(o.inherit, o.el.css(o.inherit));
                        } else {
                            for (var x = 0; x < o.inherit.length; x++) {
                                l.css(o.inherit[x], o.el.css(o.inherit[x]));
                            }
                        }
                    }

                    o.el.focus(focus).blur(blur).keydown(keydown).change(blur);
                    l.click(click);
                    o.el.before(l);
                    if (o.el.val()) { l.hide(); }
                }
            }
            return o.el;
        }
    });

    $.fn.watermark = function(o) {
        return this.each(function() {
            o = { html: o, el: this };
            return $.watermark(o);
        });
    };
})(jQuery);