if(document.images) {
	var imgs = new Array();
	imgs[0] = new Image();  imgs[0].src = "/images/common/btn_01_on.gif";
	imgs[1] = new Image();  imgs[1].src = "/images/common/btn_01_off.gif";
	imgs[2] = new Image();  imgs[2].src = "/images/common/btn_02_on.gif";
	imgs[3] = new Image();  imgs[3].src = "/images/common/btn_02_off.gif";
	imgs[4] = new Image();  imgs[4].src = "/images/common/btn_03_on.gif";
	imgs[5] = new Image();  imgs[5].src = "/images/common/btn_03_off.gif";
	imgs[6] = new Image();  imgs[6].src = "/images/common/btn_04_on.gif";
	imgs[7] = new Image();  imgs[7].src = "/images/common/btn_04_off.gif";
	imgs[8] = new Image();  imgs[8].src = "/images/common/btn_05_on.gif";
	imgs[9] = new Image();  imgs[9].src = "/images/common/btn_05_off.gif";
	imgs[10] = new Image();  imgs[10].src = "/images/common/btn_06_on.gif";
	imgs[11] = new Image();  imgs[11].src = "/images/common/btn_06_off.gif";
}
function chgimg(id, imgname) {
	if(document.images) {
		if(imgs[imgname]) {
			document.images[id].src = imgs[imgname].src;
		}
		else {
			document.images[id].src = imgname;
		}
	}
}