var ver4 = (navigator.appVersion.charAt(0) >= "4");
var NN4 = ver4 && (navigator.appName.charAt(0) == "N");
var IE4 = ver4 && (navigator.appName.charAt(0) == "M");
var NC6 = (navigator.appVersion.charAt(0) >= "5");

if (NN4 || IE4 || NC6) {
var img_b = new Array();
	img_b[8] = new Image();  img_b[8].src = "http://203.105.83.230/bline_userimg/nsi01/menu1.gif";
	img_b[9] = new Image();  img_b[9].src = "http://203.105.83.230/bline_userimg/nsi01/menu1_b.gif";
	img_b[10] = new Image();  img_b[10].src = "http://203.105.83.230/bline_userimg/nsi01/menu2.gif";
	img_b[11] = new Image();  img_b[11].src = "http://203.105.83.230/bline_userimg/nsi01/menu2_b.gif";
	img_b[12] = new Image();  img_b[12].src = "http://203.105.83.230/bline_userimg/nsi01/menu3.gif";
	img_b[13] = new Image();  img_b[13].src = "http://203.105.83.230/bline_userimg/nsi01/menu3_b.gif";
	img_b[14] = new Image();  img_b[14].src = "http://203.105.83.230/bline_userimg/nsi01/menu4.gif";
	img_b[15] = new Image();  img_b[15].src = "http://203.105.83.230/bline_userimg/nsi01/menu4_b.gif";
	img_b[16] = new Image();  img_b[16].src = "http://203.105.83.230/bline_userimg/nsi01/menu5.gif";
	img_b[17] = new Image();  img_b[17].src = "http://203.105.83.230/bline_userimg/nsi01/menu5_b.gif";
}

function b_on(nam,num){
	if(NN4 || IE4 || NC6)
	document.images[nam].src = img_b[num].src;
}

function b_out(nam,num){
	if(NN4 || IE4 || NC6)
	document.images[nam].src = img_b[num].src;
	return false;
}