if(document.layers){
	thisbrowser="NN4";
	document.location = "get_Netscape.htm";
}
<!-- load menu button images -->
n1_off = new Image();
n1_off.src = "images/n1.gif";
n1_on = new Image();
n1_on.src = "images/n1_f2.gif";

n2_off = new Image();
n2_off.src = "images/n2.gif";
n2_on = new Image();
n2_on.src = "images/n2_f2.gif";

n3_off = new Image();
n3_off.src = "images/n3.gif";
n3_on = new Image();
n3_on.src = "images/n3_f2.gif";

n4_off = new Image();
n4_off.src = "images/n4.gif";
n4_on = new Image();
n4_on.src = "images/n4_f2.gif";

n5_off = new Image();
n5_off.src = "images/n5.gif";
n5_on = new Image();
n5_on.src = "images/n5_f2.gif";

n6_off = new Image();
n6_off.src = "images/n6.gif";
n6_on = new Image();
n6_on.src = "images/n6_f2.gif";

n7_off = new Image();
n7_off.src = "images/n7.gif";
n7_on = new Image();
n7_on.src = "images/n7_f2.gif";

<!-- Menu Javascript Functions -->

function turnOn(imgName) {
    document[imgName].src = eval(imgName + "_on.src");
}

function turnOff(imgName) {
    document[imgName].src = eval(imgName + "_off.src");
}

function rollOn(imgName) {
  if (document.images) {
  	if (menuName.length) hideLayer(menuName);
	if (imageOn.length) rollOff(imageOn);
    document[imgName].src = eval(imgName + "_on.src");
  }
}

function rollOff(imgName) {
  if (document.images) {
    document[imgName].src = eval(imgName + "_off.src");
  }
}


<!-- Typical PopUp Window -->
function popTypical(url) {

	// width & height & top
	var w = 600;
	var h = 475;
	var top = 48
	// new window position -- right, left, center
	var position = "center"

	var winX = 32;
	var winY = top;

	bVer = parseInt(navigator.appVersion); 
		if(bVer >= 4) {
			if(position=="right"){
				winX = screen.width - w -32;
				}
		if(position=="center"){
			winX = (screen.width/2)-(w/2);
			winY = (screen.height/2)-(h/2);
		}
	}

	popupWin = window.open(url,'newwin','toolbar=no,width='+ w +',height= ' + h + ',directories=no,status=no,scrollbars=yes,resizable=yes,top=' + winY + ',left=' + winX +',menubar=no');
}

function calcPosition() {
var winWidth = 0;
  if( typeof( window.innerWidth ) == 'number' ) {
    //Non-IE
    winWidth = window.innerWidth;
  } else {
    if( document.documentElement &&
        ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) {
      //IE 6+ in 'standards compliant mode'
      winWidth = document.documentElement.clientWidth;
    } else {
      if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {
        //IE 4 compatible
        winWidth = document.body.clientWidth;
      }
    }
  }
if ( winWidth > 770) {
	leftOrigin = (((winWidth-770)/2));
} else {
	leftOrigin = 0;
}
left1 = leftOrigin + 53;
left2 = leftOrigin + 182;
left3 = leftOrigin + 277;
left4 = leftOrigin + 396;
left5 = leftOrigin + 513;
left6 = leftOrigin + 655;
}


function moveLayers() {
var browserName=navigator.appName; 

if(document.all){
	thisbrowser="ie"
}
if(!document.all && document.getElementById){
	thisbrowser="NN6";
}
calcPosition();
if (thisbrowser=="NN6") {
<!--- NN 6 and up--->
document.getElementById("Layer1").style.left =  left1;
document.getElementById("Layer2").style.left =  left2;
document.getElementById("Layer3").style.left =  left3;
document.getElementById("Layer4").style.left =  left4;
document.getElementById("Layer5").style.left =  left5;
document.getElementById("Layer6").style.left =  left6;
} else {
<!--- IE --->
eval(document.all["Layer1"].style.left = left1);
eval(document.all["Layer2"].style.left = left2);
eval(document.all["Layer3"].style.left = left3);
eval(document.all["Layer4"].style.left = left4);
eval(document.all["Layer5"].style.left = left5);
eval(document.all["Layer6"].style.left = left6);
	}
}