if (document.images)
{
	var img = new Array()
	img[0] = "../image/common/navi_environmental-policy.gif";
	img[1] = "../image/common/navi_environmental-policy_on.gif";
	img[2] = "../image/common/navi_organizational-structure.gif";
	img[3] = "../image/common/navi_organizational-structure_on.gif";
	img[4] = "../image/common/navi_conservation-activities.gif";
	img[5] = "../image/common/navi_conservation-activities_on.gif";
	img[6] = "../image/common/navi_next-generation.gif";
	img[7] = "../image/common/navi_next-generation_on.gif";
	img[8] = "../image/common/navi_social-activities.gif";
	img[9] = "../image/common/navi_social-activities_on.gif";
	img[10] = "../image/common/sub_navi_01.gif";
	img[11] = "../image/common/sub_navi_01_on.gif";
	img[12] = "../image/common/sub_navi_02.gif";
	img[13] = "../image/common/sub_navi_02_on.gif";
	img[14] = "../image/common/sub_navi_03.gif";
	img[15] = "../image/common/sub_navi_03_on.gif";
	img[21] = "../image/common/navi_report.gif";
	img[22] = "../image/common/navi_report_on.gif";
	img[23] = "../image/common/navi_term.gif";
	img[24] = "../image/common/navi_term_on.gif";
	img[25] = "../image/common/navi_sitemap.gif";
	img[26] = "../image/common/navi_sitemap_on.gif";
	img[30] = "image/c-btn_01.gif";
	img[31] = "image/c-btn_01_on.gif";
	img[32] = "image/c-btn_02.gif";
	img[33] = "image/c-btn_02_on.gif";
	img[34] = "image/c-btn_03.gif";
	img[35] = "image/c-btn_03_on.gif";
	img[36] = "image/btn_01.gif";
	img[37] = "image/btn_01_on.gif";

	im = new Array()
	for (var i = 0; i < img.length; i++)
	{
			im[i] = new Image()
			im[i].src = img[i]
	}
}

function swtch(num,imgname)
{
   if (document.images)
   {
      imgname.src = im[num].src;
   }
}