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(function($)
{
    /**
     * Auto-growing textareas; technique ripped from Facebook
     *
     * http://github.com/jaz303/jquery-grab-bag/tree/master/javascripts/jquery.autogrow-textarea.js
     */
    $.fn.autogrow = function(options)
    {
        return this.filter('textarea').each(function()
        {
            var self                                = this;
            var $self                               = $(self);
            var minHeight                           = $self.height();
            var noFlickerPad                        = $self.hasClass('autogrow-short') ? 0 : parseInt($self.css('lineHeight'));

var shadow = $('<div></div>').css({
                position:   'absolute',
                top:        -10000,
                left:       -10000,
                width:      $self.width(),
                fontSize:   $self.css('fontSize'),
                fontFamily: $self.css('fontFamily'),
                fontWeight: $self.css('fontWeight'),
                lineHeight: $self.css('lineHeight'),
                resize:     'none'
            }).appendTo(document.body);

var update = function()
            {
                var times = function(string, number)
                {
                    for (var i=0, r=''; i<number; i++) r += string;
                    return r;
                };

var val = self.value.replace(/</g, '&lt;')
                                    .replace(/>/g, '&gt;')
                                    .replace(/&/g, '&amp;')
                                    .replace(/\n$/, '<br/>&nbsp;')
                                    .replace(/\n/g, '<br/>')
                                    .replace(/ {2,}/g, function(space){ return times('&nbsp;', space.length - 1) + ' ' });

shadow.css('width', $self.width());
                shadow.html(val);
                $self.css('height', Math.max(shadow.height() + noFlickerPad, minHeight));
            }

$self.change(update).keyup(update).keydown(update);
            $(window).resize(update);

update();
        });
    };
})(jQuery);