browser_name = navigator.appName; 
browser_version = parseFloat(navigator.appVersion); 

if (browser_name == "Netscape" && browser_version >= 3.0) { roll = 'true'; } 
else if (browser_name == "Microsoft Internet Explorer" && browser_version >= 3.0) { roll = 'true'; } 
else { roll = 'false'; } 

function over(img,ref) { if (roll == 'true') { document.images[img].src = ref; } } 
function out(img,ref)  { if (roll == 'true') { document.images[img].src = ref; } } 

if (roll == 'true') 
{ 
m1=new Image;m1.src="./img/menu1p.gif"; 
m2=new Image;m1.src="./img/menu2p.gif"; 
m3=new Image;m1.src="./img/menu2pc.gif";
m4=new Image;m1.src="./img/menu2n.gif"; 
m5=new Image;m1.src="./img/menu2nc.gif";
m6=new Image;m1.src="./img/menu3p.gif"; 
m7=new Image;m1.src="./img/menu3pc.gif";
m8=new Image;m1.src="./img/menu3n.gif"; 
m9=new Image;m1.src="./img/menu3nc.gif"; 
m10=new Image;m1.src="./img/menu4n.gif"; 
m11=new Image;m1.src="./img/menu4nc.gif"; 
m12=new Image;m1.src="./img/back.gif"; 
m13=new Image;m1.src="./img/backc.gif"; 
m14=new Image;m1.src="./img/album.gif"; 
m15=new Image;m1.src="./img/albumc.gif"; 
}