/* vertigro v1.1 - Automatically grow your textarea vertically.
   Copyright (C) 2009 Paul Pham <http://aquaron.com/~jquery/vertigro>

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation, either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/
(function($){

   $.fn.vertigro = function($max,$div) {
   
      return this.filter('textarea').each(function() {
         
         var grow = function(e) {
            if ($max && $div) {
               if ($(this).val().length > $max && e.which != 8)
                  return false;
               $('#'+$div).html($max-$(this).val().length);
            }
            if (this.clientHeight < this.scrollHeight)
               $(this).height(this.scrollHeight 
               + (parseInt($(this).css('lineHeight').replace(/px$/,''))||20)
               + 'px');
         };
         
         $(this)
			 .css('overflow','hidden')
			 .keydown(grow)
			 .keyup(grow)
			 .change(grow);
			 
      });
      
   };
   
})(jQuery);