if (document.images) {

	// for index
	ixh1on = new Image();
	ixh1on.src = "common/images/headmenu_btn01on.gif";
	ixh1off = new Image();
	ixh1off.src = "common/images/headmenu_btn01.gif";
	ixh2on = new Image();
	ixh2on.src = "common/images/headmenu_btn02on.gif";
	ixh2off = new Image();
	ixh2off.src = "common/images/headmenu_btn02.gif";
	ixh3on = new Image();
	ixh3on.src = "common/images/headmenu_btn03on.gif";
	ixh3off = new Image();
	ixh3off.src = "common/images/headmenu_btn03.gif";
	ixh4on = new Image();
	ixh4on.src = "common/images/headmenu_btn04on.gif";
	ixh4off = new Image();
	ixh4off.src = "common/images/headmenu_btn04.gif";
	ixh5on = new Image();
	ixh5on.src = "common/images/headmenu_btn05on.gif";
	ixh5off = new Image();
	ixh5off.src = "common/images/headmenu_btn05.gif";
	ixh6on = new Image();
	ixh6on.src = "common/images/headmenu_btn06on.gif";
	ixh6off = new Image();
	ixh6off.src = "common/images/headmenu_btn06.gif";

	ixm1on = new Image();
	ixm1on.src = "common/images/menu_b1_btn01on.gif";
	ixm1off = new Image();
	ixm1off.src = "common/images/menu_b1_btn01.gif";
	ixm2on = new Image();
	ixm2on.src = "common/images/menu_b1_btn02on.gif";
	ixm2off = new Image();
	ixm2off.src = "common/images/menu_b1_btn02.gif";
	ixm3on = new Image();
	ixm3on.src = "common/images/menu_b1_btn03on.gif";
	ixm3off = new Image();
	ixm3off.src = "common/images/menu_b1_btn03.gif";
	ixm4on = new Image();
	ixm4on.src = "common/images/menu_b1_btn04on.gif";
	ixm4off = new Image();
	ixm4off.src = "common/images/menu_b1_btn04.gif";
	ixm5on = new Image();
	ixm5on.src = "common/images/menu_b1_btn05on.gif";
	ixm5off = new Image();
	ixm5off.src = "common/images/menu_b1_btn05.gif";
	ixm6on = new Image();
	ixm6on.src = "common/images/menu_b1_btn03on.gif";
	ixm6off = new Image();
	ixm6off.src = "common/images/menu_b1_btn03.gif";

	ixm11on = new Image();
	ixm11on.src = "common/images/menu_b2_btn01on.gif";
	ixm11off = new Image();
	ixm11off.src = "common/images/menu_b2_btn01.gif";
	ixm12on = new Image();
	ixm12on.src = "common/images/menu_b2_btn02on.gif";
	ixm12off = new Image();
	ixm12off.src = "common/images/menu_b2_btn02.gif";
	ixm13on = new Image();
	ixm13on.src = "common/images/menu_b2_btn03on.gif";
	ixm13off = new Image();
	ixm13off.src = "common/images/menu_b2_btn03.gif";
	ixm14on = new Image();
	ixm14on.src = "common/images/menu_b2_btn04on.gif";
	ixm14off = new Image();
	ixm14off.src = "common/images/menu_b2_btn04.gif";
	ixm51on = new Image();
	ixm51on.src = "common/images/menu_b5_btn01on.gif";
	ixm51off = new Image();
	ixm51off.src = "common/images/menu_b5_btn01.gif";
	ixm61on = new Image();
	ixm61on.src = "common/images/menu_b6_btn01on.gif";
	ixm61off = new Image();
	ixm61off.src = "common/images/menu_b6_btn01.gif";
	ixm71on = new Image();
	ixm71on.src = "common/images/menu_b7_btn01on.gif";
	ixm71off = new Image();
	ixm71off.src = "common/images/menu_b7_btn01.gif";
	ixm81on = new Image();
	ixm81on.src = "common/images/menu_b4_ttl01on.gif";
	ixm81off = new Image();
	ixm81off.src = "common/images/menu_b4_ttl01.gif";

	ibb1on = new Image();
	ibb1on.src = "top_images/index_b2_btn01on.gif";
	ibb1off = new Image();
	ibb1off.src = "top_images/index_b2_btn01.gif";
	ibb2on = new Image();
	ibb2on.src = "top_images/index_b2_btn02on.gif";
	ibb2off = new Image();
	ibb2off.src = "top_images/index_b2_btn02.gif";
}

function imgOn(imgName) {
	if (document.images) {
		document[imgName].src=eval(imgName+"on.src");
	}
}
function imgOff(imgName) {
	if (document.images) {
		document[imgName].src=eval(imgName+"off.src");
	}
}


// index map
if(document.images) {
var imgs=new Array();
	imgs[0]=new Image();
	imgs[0].src="top_images/index_b1_map00.gif";
	imgs[1]=new Image();
	imgs[1].src="top_images/index_b1_map01.gif";
	imgs[2]=new Image();
	imgs[2].src="top_images/index_b1_map02.gif";
	imgs[3]=new Image();
	imgs[3].src="top_images/index_b1_map03.gif";
	imgs[4]=new Image();
	imgs[4].src="top_images/index_b1_map04.gif";
	imgs[5]=new Image();
	imgs[5].src="top_images/index_b1_map05.gif";
	imgs[6]=new Image();
	imgs[6].src="top_images/index_b1_map06.gif";
	imgs[7]=new Image();
	imgs[7].src="top_images/index_b1_map07.gif";
	imgs[8]=new Image();
	imgs[8].src="top_images/index_b1_map08.gif";
	imgs[9]=new Image();
	imgs[9].src="top_images/index_b1_map09.gif";
	imgs[10]=new Image();
	imgs[10].src="top_images/index_b1_map10.gif";
	imgs[11]=new Image();
	imgs[11].src="top_images/index_b1_map11.gif";
}

function chgimg(imgname,imgid) {
	if(document.images) {
		if(imgs[imgid]) {
			document.images[imgname].src=imgs[imgid].src;
		} else {
			document.images[imgname].src=imgid;
		}
	}
}

// head animetion
function chgImg() {
	document.hdImg.src="common/images/header_img03b.gif";
	setTimeout("outImg()",4000);
}
function outImg() {
	document.hdImg.src="common/images/header_img03.gif";
}