var imgName ;
var img_off = new Array();
var img_on = new Array();

img_off[0] = "img/header_btn_sitemap.gif";
img_off[1] = "img/header_btn_home.gif";
img_off[2] = "img/header_btn_list.gif";
img_off[3] = "img/header_btn_step.gif";
img_off[4] = "img/header_btn_entertainment.gif";
img_off[5] = "img/header_btn_market.gif";
img_off[6] = "img/t-web_btn_01.gif";
img_off[7] = "img/t-web_btn_02.gif";
img_off[8] = "img/t-web_btn_03.gif";
img_off[9] = "img/t-web_btn_04.gif";
img_off[10] = "img/t-web_btn_05.gif";
img_off[11] = "img/t-web3_btn_01.gif";
img_off[12] = "img/t-web3_btn_02.gif";
img_off[13] = "img/t-web3_btn_03.gif";
img_off[14] = "img/t-web3_btn_04.gif";
img_off[15] = "img/t-web3_btn_05.gif";
img_off[16] = "img/t-web3_btn_06.gif";
img_off[17] = "img/t-web3_btn_07.gif";
img_off[18] = "img/t-web3_btn_08.gif";
img_off[19] = "img/t-web3_btn_09.gif";
img_off[20] = "img/btn_back.gif";

img_on[0] = "img/header_btn_sitemap_on.gif";
img_on[1] = "img/header_btn_home_on.gif";
img_on[2] = "img/header_btn_list_on.gif";
img_on[3] = "img/header_btn_step_on.gif";
img_on[4] = "img/header_btn_entertainment_on.gif";
img_on[5] = "img/header_btn_market_on.gif";
img_on[6] = "img/t-web_btn_01_on.gif";
img_on[7] = "img/t-web_btn_02_on.gif";
img_on[8] = "img/t-web_btn_03_on.gif";
img_on[9] = "img/t-web_btn_04_on.gif";
img_on[10] = "img/t-web_btn_05_on.gif";
img_on[11] = "img/t-web3_btn_01_on.gif";
img_on[12] = "img/t-web3_btn_02_on.gif";
img_on[13] = "img/t-web3_btn_03_on.gif";
img_on[14] = "img/t-web3_btn_04_on.gif";
img_on[15] = "img/t-web3_btn_05_on.gif";
img_on[16] = "img/t-web3_btn_06_on.gif";
img_on[17] = "img/t-web3_btn_07_on.gif";
img_on[18] = "img/t-web3_btn_08_on.gif";
img_on[19] = "img/t-web3_btn_09_on.gif";
img_on[20] = "img/btn_back_on.gif";

function chImg_on(imgName,imgID){
   document.images[imgName].src=img_on[imgID];
}

function chImg_off(imgName,imgID){
   document.images[imgName].src=img_off[imgID];
}