function imgchg_home_hover(){document.home.src = "images/gmenu_home_hover.jpg"}
function imgchg_home_out(){document.home.src = "images/gmenu_home.jpg"}

function imgchg_officialinfo_hover(){document.officialinfo.src = "images/gmenu_official-info_hover.jpg"}
function imgchg_officialinfo_out(){document.officialinfo.src = "images/gmenu_official-info.jpg"}

function imgchg_showcontents_hover(){document.showcontents.src = "images/gmenu_show-contents_hover.jpg"}
function imgchg_showcontents_out(){document.showcontents.src = "images/gmenu_show-contents.jpg"}

function imgchg_topics_hover(){document.topics.src = "images/gmenu_topics_hover.jpg"}
function imgchg_topics_out(){document.topics.src = "images/gmenu_topics.jpg"}

function imgchg_sponsors_hover(){document.sponsors.src = "images/gmenu_sponsors_hover.jpg"}
function imgchg_sponsors_out(){document.sponsors.src = "images/gmenu_sponsors.jpg"}

function imgchg_access_hover(){document.access.src = "images/gmenu_access_hover.jpg"}
function imgchg_access_out(){document.access.src = "images/gmenu_access.jpg"}