Hi,
It looks like you have a Javascript compatiblity error between jQuery and mootools.
The "$" function is override by jQuery but it shouldn't ; the vote.js file, which use mootools provide some non-working elements to the rest of the script.
You can edit the file "media/com_hikashop/js/vote.js" and replace the references of "$(....)" by "document.id(....)".
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.