var cando = false;
var browserName = navigator.appName;
var browserVer = parseInt(navigator.appVersion);
if (browserName == "Netscape" && browserVer >= 3) cando = true;
else if( browserVer >=4 ) cando=true;
if( cando ) {
	imag = new Array();
	imag[1] = "img/im/m_arr2.gif";
	imag[0] = "img/im/m_arr2.gif";
	im = new Array()
	for (var i = 0; i < imag.length; i++){
		if( imag[i] != "" ) {
			im[i] = new Image();
			im[i].src = imag[i];
		}
	}
}

function swtch(num,imgname){
	if( cando )
	document[imgname].src = im[num].src;
}