imgsrc = new Array();
imgsrc[0] = "/img/common/gnavi_home.jpg";
imgsrc[1] = "/img/common/gnavi_home_u.jpg";
imgsrc[2] = "/img/common/gnavi_knowledge.jpg";
imgsrc[3] = "/img/common/gnavi_knowledge_u.jpg";
imgsrc[4] = "/img/common/gnavi_ticketguide.jpg";
imgsrc[5] = "/img/common/gnavi_ticketguide_u.jpg";
imgsrc[6] = "/img/common/gnavi_maintrain.jpg";
imgsrc[7] = "/img/common/gnavi_maintrain_u.jpg";
imgsrc[8] = "/img/common/gnavi_country.jpg";
imgsrc[9] = "/img/common/gnavi_country_u.jpg";
imgsrc[10] = "/img/common/gnavi_map.jpg";
imgsrc[11] = "/img/common/gnavi_map_u.jpg";
imgsrc[12] = "/img/common/gnavi_movie.jpg";
imgsrc[13] = "/img/common/gnavi_movie_u.jpg";
imgsrc[14] = "/img/common/gnavi_news.jpg";
imgsrc[15] = "/img/common/gnavi_news_u.jpg";
imgsrc[16] = "/img/common/gnavi_mailmagazine.jpg";
imgsrc[17] = "/img/common/gnavi_mailmagazine_u.jpg";

img = new Array();

for(i=0; i<imgsrc.length; i++){
img[i] = new Image();
img[i].src = imgsrc[i];
}
function highlight(num,imgname){
document.images[imgname].src = img[num].src;
}