browser_name = navigator.appName;
browser_version = parseFloat(navigator.appVersion); 
 
if (browser_name == "Netscape" && browser_version < 2.0)
   {roll = 'false';}
else if (browser_name == "Netscape" && browser_version == 2.0)
   {roll = 'false';}
else if (browser_name == "Netscape" && browser_version >= 3.0)
   {roll = 'true';}
else if (browser_name == "Microsoft Internet Explorer" && browser_version <= 2.0)
   {roll = 'false';}
else if (browser_name == "Microsoft Internet Explorer" && browser_version >= 3.0)
   {roll = 'true';}
else if (browser_version >= 4.0) 
   {roll = 'true';}
else
   {roll = 'false';}
 
function toggle(img,ref)
   {if (roll == 'true')
       {
	       var ref = document.images[img].src;
		   if (ref.indexOf('0.gif')==-1) {ref = findandreplace(ref,'1.gif','0.gif');}
		   else {ref = findandreplace(ref,'0.gif','1.gif');}
		   document.images[img].src = ref;
	   }
   }
 
//end