if(navigator.appVersion.charAt(0) >= "3"){
	var img = new Array();

	img[10] = new Image(); img[10].src = "/img/cmn/bt_01.gif";
	img[11] = new Image(); img[11].src = "/img/cmn/bt_01_on.gif";
	img[20] = new Image(); img[20].src = "/img/cmn/bt_02.gif";
	img[21] = new Image(); img[21].src = "/img/cmn/bt_02_on.gif";
	img[30] = new Image(); img[30].src = "/img/cmn/bt_03.gif";
	img[31] = new Image(); img[31].src = "/img/cmn/bt_03_on.gif";
	img[40] = new Image(); img[40].src = "/img/cmn/bt_04.gif";
	img[41] = new Image(); img[41].src = "/img/cmn/bt_04_on.gif";
	img[50] = new Image(); img[50].src = "/img/cmn/bt_05.gif";
	img[51] = new Image(); img[51].src = "/img/cmn/bt_05_on.gif";
	img[60] = new Image(); img[60].src = "/img/cmn/bt_06.gif";
	img[61] = new Image(); img[61].src = "/img/cmn/bt_06_on.gif";
	img[70] = new Image(); img[70].src = "/img/cmn/bt_07.gif";
	img[71] = new Image(); img[71].src = "/img/cmn/bt_07_on.gif";

	}

function btnon(nam,num){
	if(navigator.appVersion.charAt(0) >= "3"){
		document.images[nam].src = img[num].src;
	}else{}
}
function btnoff(nam,num){document.images[nam].src = img[num].src;}