$(this).parent().parent().find('td')
$(this).parents('td')
"2.3" * 2 => 4.6
"2,3" * 2 => NaN
опции через запятую
SELECT DISTINCT `title` FROM `hotel`
LEFT JOIN `hotel_option` ON `id` = `hotel_id`
WHERE `option_id` IN(...)
canvas.getImageData(0, 0, canvas.width, canvas.height)
// index.php
function ololo ($variable) {
include 'ololo.php';
}
// ololo.php
echo $variable;
// index.php
function ololo ($variable) {
echo $variable;
}