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 >= 4.0) { roll = 'true'; }
     else { roll = 'false'; }

     function msover1(img,ref) { if (roll == 'true') { document.images[img].src = ref.src; } }
     function msout1(img,ref)  { if (roll == 'true') { document.images[img].src = ref.src; } }

if(document.images) {

B10a = new Image();
B10a.src = "e-mailr.gif";
B10 = new Image();
B10.src = "e-mailr2.gif";
}