/* 画像先読み */
			if(document.images){
				var imgCh=new Array();
					imgCh[0] = new Image(),imgCh[0].src="img/but_home_off.gif";
					imgCh[1] = new Image(),imgCh[1].src="img/but_home_on.gif";
					imgCh[2] = new Image(),imgCh[2].src="img/but_introduction_off.gif";
					imgCh[3] = new Image(),imgCh[3].src="img/but_introduction_on.gif";
					imgCh[4] = new Image(),imgCh[4].src="img/but_diary_off.gif";
					imgCh[5] = new Image(),imgCh[5].src="img/but_diary_on.gif";
					imgCh[6] = new Image(),imgCh[6].src="img/but_shop_off.gif";
					imgCh[7] = new Image(),imgCh[7].src="img/but_shop_on.gif";
					imgCh[8] = new Image(),imgCh[8].src="img/but_inquiry_off.gif";
					imgCh[9] = new Image(),imgCh[9].src="img/but_inquiry_on.gif";
					imgCh[10] = new Image(),imgCh[10].src="img/but_co_guidance_off.gif";
					imgCh[11] = new Image(),imgCh[11].src="img/but_co_guidance_on.gif";
					
					imgCh[12] = new Image(),imgCh[12].src="/img/icon_soft_off.gif";
					imgCh[13] = new Image(),imgCh[13].src="/img/icon_soft_on.gif";
					imgCh[14] = new Image(),imgCh[14].src="/img/icon_sample_off.gif";
					imgCh[15] = new Image(),imgCh[15].src="/img/icon_sample_on.gif";
					imgCh[16] = new Image(),imgCh[16].src="/img/icon_voice_off.gif";
					imgCh[17] = new Image(),imgCh[17].src="/img/icon_voice_on.gif";
					imgCh[18] = new Image(),imgCh[18].src="/img/icon_contents_off.gif";
					imgCh[19] = new Image(),imgCh[19].src="/img/icon_contents_on.gif";
					imgCh[20] = new Image(),imgCh[20].src="/img/icon_qanda_off.gif";
					imgCh[21] = new Image(),imgCh[21].src="/img/icon_qanda_on.gif";
					imgCh[22] = new Image(),imgCh[22].src="/img/icon_price_off.gif";
					imgCh[23] = new Image(),imgCh[23].src="/img/icon_price_on.gif";

					imgCh[24] = new Image(),imgCh[24].src="/img/icon4_soft_off.gif";
					imgCh[25] = new Image(),imgCh[25].src="/img/icon4_soft_on.gif";
					imgCh[26] = new Image(),imgCh[26].src="/img/icon4_contents_off.gif";
					imgCh[27] = new Image(),imgCh[27].src="/img/icon4_contents_on.gif";
					imgCh[28] = new Image(),imgCh[28].src="/img/icon4_voice_off.gif";
					imgCh[29] = new Image(),imgCh[29].src="/img/icon4_voice_on.gif";
					imgCh[30] = new Image(),imgCh[30].src="/img/icon4_price_off.gif";
					imgCh[31] = new Image(),imgCh[31].src="/img/icon4_price_on.gif";
					imgCh[32] = new Image(),imgCh[32].src="/img/icon4_sample_off.gif";
					imgCh[33] = new Image(),imgCh[33].src="/img/icon4_sample_on.gif";
					
					imgCh[34] = new Image(),imgCh[34].src="/img/icon3_soft_off.gif";
					imgCh[35] = new Image(),imgCh[35].src="/img/icon3_soft_on.gif";
					imgCh[36] = new Image(),imgCh[36].src="/img/icon3_voice_off.gif";
					imgCh[37] = new Image(),imgCh[37].src="/img/icon3_voice_on.gif";
					imgCh[38] = new Image(),imgCh[38].src="/img/icon3_oder_off.gif";
					imgCh[39] = new Image(),imgCh[39].src="/img/icon3_oder_on.gif";
					
					}
		/* マウスオーバーボタン */
			function chBttn(name,num){
				if(document.images)document.images[name].src = imgCh[num].src;
			}