(function($) {

        // jQuery plugin definition
        $.fn.autogrow = function(minHeight, maxHeight, bottomPadding) {

                var hCheck = !($.browser.msie || $.browser.opera);
           

                // resize a textarea
                function ResizeTextarea(e) {

                        // event or initialize element?
                        e = e.target || e;

                        // find content length and box width
                        var vlen = e.value.length, ewidth = e.offsetWidth;
                        if (vlen != e.valLength || ewidth != e.boxWidth) {

                                if (hCheck && (vlen < e.valLength || ewidth != e.boxWidth)) e.style.height = "0px";
                                var h = Math.max(e.expandMin, Math.min(e.scrollHeight, e.expandMax));

                                e.style.overflow = (e.scrollHeight > h ? "auto" : "hidden");
                                e.style.height = h + "px";

                                e.valLength = vlen;
                                e.boxWidth = ewidth;
                        }

                        return true;
                };

                // initialize
                this.each(function() {

                        // is a textarea?
                        if (this.nodeName.toLowerCase() != "textarea") return;

                        // set height restrictions
                        var p = this.className.match(/expand(\d+)\-*(\d+)*/i);
                        this.expandMin = minHeight || (p ? parseInt('0'+p[1], 10) : 0);
                        this.expandMax = maxHeight || (p ? parseInt('0'+p[2], 10) : 99999);

                        // initial resize
                        ResizeTextarea(this);

                        // zero vertical padding and add events
                        if (!this.Initialized) {
                                this.Initialized = true;
                                $(this).css("padding-bottom", bottomPadding+'px');
                                $(this).bind("keyup focus change", ResizeTextarea);
                        }
                });

                return this;
        };

})(jQuery);