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') 

{ 
a1=new Image;a1.src="images/button/glavnaya.png"; 

a2=new Image;a2.src="images/button/glavnaya_ok.png"; 

a3=new Image;a3.src="images/button/service.png"; 

a4=new Image;a4.src="images/button/service_ok.png"; 

a5=new Image;a5.src="images/button/numera.png"; 

a6=new Image;a6.src="images/button/numera_ok.png"; 

a7=new Image;a7.src="images/button/contakt.png"; 

a8=new Image;a8.src="images/button/contakt_ok.png"; 

a9=new Image;a9.src="images/button/halereya.png"; 

a10=new Image;a10.src="images/button/halereya_ok.png"; 

a11=new Image;a11.src="images/button/guest.png"; 

a12=new Image;a12.src="images/button/guest_ok.png"; 


}