var image = new Array();
image[0] = 'Kaikoma@Sensuitoge06_350.jpg';
image[1] = 'Kitadeke@Notoridake_07_350.jpg';
image[2] = 'Kaikoma@Hayakawa_350.jpg';
image[3] = 'Kitadake@Hirogawara_07_350.jpg';
image[4] = 'Kitadake@Yasyajin_350.jpg';
image[5] = 'Higashidake@Nakadake.jpg';
image[6] = 'Akaishi@Warusawa06_350.jpg';
image[7] = 'Warusawadake_sunset06_350.jpg';
image[8] = 'Higashidake@Akaishi06_350.jpg';
image[9] = 'Akaishi@Koakaishi06_350.jpg';
image[10] = 'Maedake@Akaishi06_350.jpg';
image[11] = 'Hijiridake@Hyakkenbora06_35.jpg';
image[12] = 'Maedake@Daijyoujidaira06_35.jpg';
image[13] = 'Hijiridake@Okuhijiridake_35.jpg';
image[14] = 'Hijiridake@Kohijiri_350.jpg';
image[15] = 'Kaikoma_Senjyo_07_350.jpg';
image[16] = 'Shiomi@Kitamata_350.jpg';
image[17] = 'Shiomi@Sanpuku_350.jpg';
image[18] = 'Shiomi@Notori_350.jpg';
var image_num = new Array();
var p = image.length;
var temp_img_num;

var pre_load = new Array();



for (i = 0; i < p; i++) {
  pre_load[i] = new Image();
  pre_load[i].src = 'photo/main_page/'+image[i];
}

for (i = 0; i < p; i++) {
image_num[i]=i;
}


function swap(id, data) {
	document.images[id].src=eval(data).src
}

function onload_img(){
	for (i = 0; i < p; i++) {
		document.images['photo'+i].src = pre_load[i].src;
	}
}

function set_img(pos_num1,pos_num2)
{
temp_img_num=image_num[pos_num1];
document.images['photo'+pos_num1].src =pre_load[image_num[pos_num2]].src; 
document.images['photo'+pos_num2].src =pre_load[image_num[pos_num1]].src; 

image_num[pos_num1]=image_num[pos_num2];
image_num[pos_num2]=temp_img_num;
}

function change_img(pos_num,pic_num)
{
    document.images['photo'+pos_num].src = pre_load[image_num[pic_num]].src;
}


function recover_img(pos_num){

    document.images['photo'+pos_num].src =pre_load[image_num[pos_num]].src; 
}