// JavaScript Document
function sign_over(){document.images['sign'].src= "imgs/tb_sign_bt_ov.gif";}
function sign_out(oj){document.images['sign'].src= "imgs/tb_sign_bt.gif";}

function how_over(){document.images['how'].src= "imgs/nav_how_bt_ov.gif";}
function how_out(oj){document.images['how'].src= "imgs/nav_how_bt.gif";}

function ch_over(){document.images['ch'].src= "imgs/nav_ch_bt_ov.gif";}
function ch_out(oj){document.images['ch'].src= "imgs/nav_ch_bt.gif";}

function sp_over(){document.images['sp'].src= "imgs/nav_sp_bt_ov.gif";}
function sp_out(oj){document.images['sp'].src= "imgs/nav_sp_bt.gif";}

function ab_over(){document.images['ab'].src= "imgs/nav_ab_bt_ov.gif";}
function ab_out(oj){document.images['ab'].src= "imgs/nav_ab_bt.gif";}


function ch_mo_over(){document.images['ch_mo'].src= "imgs/ch_nav_mo_bt_ov.gif";}
function ch_mo_out(oj){document.images['ch_mo'].src= "imgs/ch_nav_mo_bt.gif";}
function ch_dvd_over(){document.images['ch_dvd'].src= "imgs/ch_nav_dvd_bt_ov.gif";}
function ch_dvd_out(oj){document.images['ch_dvd'].src= "imgs/ch_nav_dvd_bt.gif";}
function ch_tv_over(){document.images['ch_tv'].src= "imgs/ch_nav_tv_bt_ov.gif";}
function ch_tv_out(oj){document.images['ch_tv'].src= "imgs/ch_nav_tv_bt.gif";}
function ch_ga_over(){	document.images['ch_ga'].src= "imgs/ch_nav_ga_bt_ov.gif";}
function ch_ga_out(oj){document.images['ch_ga'].src= "imgs/ch_nav_ga_bt.gif";}

function sp_faq_over(){document.images['sp_faq'].src= "imgs/sp_nav_faq_bt_ov.gif";}
function sp_faq_out(oj){document.images['sp_faq'].src= "imgs/sp_nav_faq_bt.gif";}
function sp_co_over(){document.images['sp_co'].src= "imgs/sp_nav_co_bt_ov.gif";}
function sp_co_out(oj){document.images['sp_co'].src= "imgs/sp_nav_co_bt.gif";}

function ab_pt_over(){document.images['ab_pt'].src= "imgs/ab_nav_pt_bt_ov.gif";}
function ab_pt_out(oj){document.images['ab_pt'].src= "imgs/ab_nav_pt_bt.gif";}
function ab_cr_over(){document.images['ab_cr'].src= "imgs/ab_nav_cr_bt_ov.gif";}
function ab_cr_out(oj){document.images['ab_cr'].src= "imgs/ab_nav_cr_bt.gif";}
function ab_tc_over(){document.images['ab_tc'].src= "imgs/ab_nav_tc_bt_ov.gif";}
function ab_tc_out(oj){document.images['ab_tc'].src= "imgs/ab_nav_tc_bt.gif";}
function ab_cu_over(){document.images['ab_cu'].src= "imgs/ab_nav_cu_bt_ov.gif";}
function ab_cu_out(oj){document.images['ab_cu'].src= "imgs/ab_nav_cu_bt.gif";}