(function($){ 
     $.fn.extend({  
         limit: function(limit,element) {

           
      if($("#details").length == 0) 
      {
        return;
      }
           
      var interval, f;
      var self = $(this);
          
      $(this).focus(function(){
        interval = window.setInterval(substring,100);
      });
      
      $(this).blur(function(){
        clearInterval(interval);
        substring();
      });
      
      substringFunction = "function substring(){ var val = $(self).val();var length = val.length;if(length > limit){$(self).val($(self).val().substring(0,limit));}";
      if(typeof element != 'undefined')
        substringFunction += "if($(element).html() != limit-length){$(element).html((limit-length<=0)?'0':limit-length);}"
        
      substringFunction += "}";
      eval(substringFunction);
      
      
      
      substring();
      
        } 
    }); 
})(jQuery);