People who want to register can still print out the forms and fill them out by hand.
Either way, the forms must be manually signed and filed.
Officials took down the site Tuesday night, after learning it was possible to tamper with the coding and use the site to view other people's registration information, including voters' driver's license numbers or the last four digits of Social Security numbers.
They say they don't know how many forms may have been viewed this way, but are trying to find out.
