if(document.images)	{
	var imgs = new Array();
	imgs[0]	= new Image(); imgs[0].src = "img/navi/navi_01.gif";
	imgs[1]	= new Image(); imgs[1].src = "img/navi/navi_01_on.gif";
	imgs[2]	= new Image(); imgs[2].src = "img/navi/navi_02.gif";
	imgs[3]	= new Image(); imgs[3].src = "img/navi/navi_02_on.gif";
	imgs[4]	= new Image(); imgs[4].src = "img/navi/navi_03.gif";
	imgs[5]	= new Image(); imgs[5].src = "img/navi/navi_03_on.gif";
	imgs[6]	= new Image(); imgs[6].src = "img/navi/navi_04.gif";
	imgs[7]	= new Image(); imgs[7].src = "img/navi/navi_04_on.gif";
	imgs[8]	= new Image(); imgs[8].src = "img/navi/navi_05.gif";
	imgs[9]	= new Image(); imgs[9].src = "img/navi/navi_05_on.gif";
	imgs[10]= new Image(); imgs[10].src= "img/navi/navi_06.gif";
	imgs[11]= new Image(); imgs[11].src= "img/navi/navi_06_on.gif";
	imgs[12]= new Image(); imgs[12].src= "img/navi/navi_12.gif";
	imgs[13]= new Image(); imgs[13].src= "img/navi/navi_12_on.gif";
	imgs[14]= new Image(); imgs[14].src= "img/navi/navi_13.gif";
	imgs[15]= new Image(); imgs[15].src= "img/navi/navi_13_on.gif";
	imgs[16]= new Image(); imgs[16].src= "img/navi/home.gif";
	imgs[17]= new Image(); imgs[17].src= "img/navi/home_on.gif";
}
function chgimg(id, imgname) {
	if(document.images)	{
		if(imgs[imgname])	{
				document.images[id].src	=	imgs[imgname].src;
		}
		else{
				document.images[id].src	=	imgname;
		}
	}
}