public function _fadeIn($element='this', $speed='', $callback='', $immediatly=false) {
		$element=$this->_prep_element($element);
		$speed=$this->_validate_speed($speed);

		if ($callback!='') {
			$callback=", function(){\n{$callback}\n}";
		}

		$str="$({$element}).fadeIn({$speed}{$callback});";

		if ($immediatly)
			$this->jquery_code_for_compile[]=$str;
			return $str;
	}