function showimg1(){
document.area1.src = "../map/map_img/car_root_all.gif";
}

function showimg2(){
document.area1.src = "../map/map_img/car_root_osaka.gif";
}

function showimg3(){
document.area1.src = "../map/map_img/car_root_nara.gif";
}

function showimg4(){
document.area1.src = "../map/map_img/car_root_nanki.gif";
}