Textarea auto resize

testResize.js

    $.fn.textResizer = function(options) {
        var el = $(this), h;
        var settings = {
            minHeight: el.height(),
            maxHeight: 300,
            duration: 100
        }
        if (options) {
            $.extend(settings, options);
        }
        var clone = el.clone().removeAttr('id').removeAttr('class').css({position:'absolute', top:'-9999em',left:'-9999em',width: el.width(), height: 'auto'}).appendTo('body');
        $(this).keyup(function(e) {
            h = clone.val(el.val()).height(0).scrollTop(10000).scrollTop() + 16;
            h = Math.min(Math.max(settings.minHeight, h), settings.maxHeight);
            if (el.height() != h) {
                if($.browser.msie) {
                    el.height(h);
                } else {
                    el.stop(1,1).animate({height: h}, settings.duration);
                }
            }
        });
        return this;
    }