/* https://github.com/akaihola/jquery-simpleautogrow */
(function(jQuery) {
	jQuery.fn.simpleautogrow = function() {
		return this.each(function() {
			new jQuery.simpleautogrow(this);
		});
	};
	jQuery.simpleautogrow = function(e) {
		var self = this;
		var $e = this.textarea = jQuery(e).css( {
			overflow : 'hidden',
			display : 'block'
		}).bind('focus', function() {
			this.timer = window.setInterval(function() {
				self.checkExpand();
			}, 200);
		}).bind('blur', function() {
			clearInterval(this.timer);
		});
		this.border = $e.outerHeight() - $e.innerHeight();
		this.clone = $e.clone().css( {
			position : 'absolute',
			visibility : 'hidden'
		}).attr('name', '')
		$e.height(e.scrollHeight + this.border).after(this.clone);
		this.checkExpand();
	};
	jQuery.simpleautogrow.prototype.checkExpand = function() {
		var target_height = this.clone[0].scrollHeight + this.border;
		if (this.textarea.outerHeight() != target_height)
			this.textarea.height(target_height + 'px');
		this.clone.attr('value', this.textarea.attr('value')).height(0);
	};
})(jQuery);