var flag = false;


if ((navigator.appName.indexOf('Netscape') >= 0 && navigator.appVersion.charAt(0) >= '3') || (navigator.appName.indexOf('Microsoft') >= 0 && navigator.appVersion.charAt(0) >= '4')) {
	flag = true;
}



if (document.images) {
	var menu1=new Image()
	menu1.src="images/btn-home.gif"
	var menu2=new Image()
	menu2.src="images/btn-news.gif"
	var menu3=new Image()
	menu3.src="images/btn-careers.gif"
	var menu4=new Image()
	menu4.src="images/btn-contact.gif"
	
	var hide=new Image()
	hide.src="images/spacer.gif" 
}

function MouseOn(imgNumb) {
  if (document.images) {
    document['Preview'].src = eval("menu"+ imgNumb + ".src");
  //  window.status = A[imgNumb];
  }
}
function MouseOff() {
   if (document.images) {
     document['Preview'].src = eval("hide.src");
     window.status = ' ';
   }
}