var SwImg; SwImg = new Array;

ImgPreload('image1', 'images/img_sub/btn2_home.gif', 'images/img_sub/btn2_home_up.gif');
ImgPreload('image2', 'images/img_sub/btn2_housing.gif', 'images/img_sub/btn2_housing_up.gif');
ImgPreload('image3', 'images/img_sub/btn2_mutenka.gif', 'images/img_sub/btn2_mutenka_up.gif');
ImgPreload('image4', 'images/img_sub/btn2_recycle.gif', 'images/img_sub/btn2_recycle_up.gif');
ImgPreload('image5', 'images/img_sub/btn2_fudousan.gif', 'images/img_sub/btn2_fudousan_up.gif');
ImgPreload('image6', 'images/img_sub/btn2_contact.gif', 'images/img_sub/btn2_contact_up.gif');
ImgPreload('image7', 'images/img_sub/btn2_doboku.gif', 'images/img_sub/btn2_doboku_up.gif');
ImgPreload('image8', 'images/img_sub/btn2_kentiku.gif', 'images/img_sub/btn2_kentiku_up.gif');
ImgPreload('image9', 'images/img_sub/btn2_unyu.gif', 'images/img_sub/btn2_unyu_up.gif');
ImgPreload('image10', 'images/img_sub/btn2_gaiyou.gif', 'images/img_sub/btn2_gaiyou_up.gif');
ImgPreload('image11', 'images/img_sub/btn2_info.gif', 'images/img_sub/btn2_info_up.gif');

ImgPreload('image12', 'images/img_sub/btn_kikai.gif', 'images/img_sub/btn_kikai2.gif');
ImgPreload('image13', 'images/img_recycle/btn_syaryou.gif', 'images/img_recycle/btn_syaryou2.gif');
ImgPreload('image14', 'images/img_recycle/btn_eco.gif', 'images/img_recycle/btn_eco2.gif');

ImgPreload('image15', 'images/img_recycle/img_eco/btn_eco.gif', 'images/img_recycle/img_eco/btn_eco2.gif');
ImgPreload('image16', 'images/img_recycle/img_eco/btn_gareki.gif', 'images/img_recycle/img_eco/btn_gareki2.gif');
ImgPreload('image17', 'images/img_recycle/img_eco/btn_kikuzu.gif', 'images/img_recycle/img_eco/btn_kikuzu2.gif');
ImgPreload('image18', 'images/img_recycle/img_eco/btn_sekkou.gif', 'images/img_recycle/img_eco/btn_sekkou2.gif');
ImgPreload('image19', 'images/img_recycle/img_eco/btn_plant.gif', 'images/img_recycle/img_eco/btn_plant2.gif');
ImgPreload('image20', 'images/img_recycle/img_eco/btn_map.gif', 'images/img_recycle/img_eco/btn_map2.gif');

ImgPreload('image21', 'images/img_housing/btn_nagare.gif', 'images/img_housing/btn_nagare2.gif');
ImgPreload('image22', 'images/img_housing/btn_sekourei.gif', 'images/img_housing/btn_sekourei2.gif');

ImgPreload('image23', 'images/img_mutenka/btn_mutenkahp.gif', 'images/img_mutenka/btn_mutenkahp2.gif');
ImgPreload('image24', 'images/img_mutenka/btn_siryou.gif', 'images/img_mutenka/btn_siryou2.gif');
ImgPreload('image25', 'images/img_mutenka/btn_showroom.gif', 'images/img_mutenka/btn_showroom2.gif');


function ImgPreload() {
	var N = ImgPreload.arguments[0];
	SwImg[N] = new Image();
	SwImg[N][0] = new Image();
	SwImg[N][0].src = ImgPreload.arguments[1];
	SwImg[N][1] = new Image();
	SwImg[N][1].src = ImgPreload.arguments[2];
}

function ImgChenge() {
	var ID = ImgChenge.arguments[0];
	var N  = ImgChenge.arguments[1];
	document.images[ID].src = SwImg[ID][N].src;
}