(function($) {
   $.fn.textareacontrol = function(settings) {
    lbc = function(str){
        var s = str.replace(/\r/g,'').split('\n');
        return s.length
    }
    $(this).live('keyup', function(event){
        var element=$(this);
            var lb=lbc(element.val());
            if(event.keyCode=='13') {
                var new_rows=(lb);
                $(this).attr("rows",new_rows);
            }
            if(event.keyCode=='8' || event.keyCode=='46') {
                var new_rows=(lb);
                element.attr("rows",new_rows);
            }

    });
    return this;
   };
 })(jQuery);