function Chg_LImg(rstrNo)
{
	var pintCnt;
	var pstrImg1;
	var pstrImg2;

	pstrImg1 = "/nav_" + rstrNo + ".gif";

	for(pintCnt = 0; pintCnt < document.images.length; pintCnt++)
	{
		pstrImg2 = document.images[pintCnt].src;
		pstrImg2 = pstrImg2.substring(pstrImg2.length - 11, pstrImg2.length);
		if(pstrImg1 == pstrImg2)
		{
			document.images[pintCnt].src = "img/nav_" + rstrNo + "on.gif";
			break;
		}
	}
}

function Ret_LImg(rstrNo)
{
	var pintCnt;
	var pstrImg1;
	var pstrImg2;

	pstrImg1 = "/nav_" + rstrNo + "on.gif";

	for(pintCnt = 0; pintCnt < document.images.length; pintCnt++)
	{
		pstrImg2 = document.images[pintCnt].src;
		pstrImg2 = pstrImg2.substring(pstrImg2.length - 13, pstrImg2.length);
		if(pstrImg1 == pstrImg2)
		{
			document.images[pintCnt].src = "img/nav_" + rstrNo + ".gif";
			break;
		}
	}
}