var menuEnabled = false;
var path = "front/m";
var count = 8;

for (i=1; i<=count; i++) { eval("menua"+i+" = new Image(); menua"+i+".src = '"+path+i+"a.gif';"); };

for (i=1; i<=count; i++) { eval("menu"+i+" = new Image(); menu"+i+".src = '"+path+i+".gif';"); };

function MenuOff(n) {
  if (menuEnabled) eval("document.m"+n+".src = menu"+n+".src");
};

function MenuOn(n) {
  if (menuEnabled) eval("document.m"+n+".src = menua"+n+".src");
};

var appV = navigator.appVersion.charAt(0);
var appN = navigator.appName.charAt(0);
menuEnabled = ((appV>=3 && appN=='N') || (appV>=4 && appN=='M'));