Need a little help with bookmark script (

[Sinnah]

Hello people,

Can somebody help me with this bookmark script?
The script work just fine, but I'm running a intranet site and I want people in this building to be able to bookmark this site, wich is located at a server here.

// this is the script

<SCRIPT LANGUAGE="JavaScript">
var txt = "Toev. aan favorieten";
var url = "//Server\directory\sub-directory\index.html";
var who = "Title";

var ver = navigator.appName;
var num = parseInt(navigator.appVersion);
if ((ver == "Microsoft Internet Explorer")&&(num >= 4)) {
document.write('<A HREF="javascript:window.external.AddFavorite(url,who);" ');
document.write('onMouseOver=" window.status=');
document.write("txt; return true ");
document.write('"onMouseOut=" window.status=');
document.write("' '; return true ");
document.write('">'+ txt + '</a>');
}else{
txt += " (Ctrl+D)";
document.write(txt);
}
</script>


If I use var url like http://www.bla.com it works good!
When I change the var url to:

"//Server\directory\sub-directory\index.html
or
"file://Server\directory\sub-directory\index.html


The script stops working with an unknown error

Any help would be great

[Sinnah]

Thank you very much, works like a charme