Forum:Lava Golem help

If your opponent special summoned Lava Golem in defense mode to your field can its battle position be changed to attack mode. I'm really confused because my opponent said it cannot change its battle position. http://yugioh.wikia.com/indehttp://yugioh.wikia.com/index.php?title=Forum:Lava_Golem_help&action=submit#x.php?title=Forum:Lava_Golem_help&action=shttp://yugioh.wikia.com/index.php?title=Forum:Lava_Golem_help&action=submit#ubmit