A judge late yesterday temporarily blocked Colorado’s ban on laws protecting homosexuals from discrimination from taking effect today, while he decides whether to issue a more permanent order.The law was to take effect at 12:01 a.m. this morning; Denver District Judge Jeffrey Bayless said he would announce at a hearing at 4 p.m. today whether he would extend the ban. He has heard testimony in the case all week. Protection prohibition Amendment 2, approved by Colorado voters Nov. 3, prohibits state and local governments from passing laws that protect homosexuals from discrimination. Laws on the books in Boulder, Denver and Aspen that protect homosexuals from discrimination would be invalidated. The measure has provoked a national outcry by homosexual-rights supporters and has spurred several major cities and national organizations to boycott Colorado. Several major conventions have been canceled and some celebrities have shunned Aspen as a vacation spot.