printing page with macintosh and javascript

Hi everybody.
Why this script works fine with windows+ie, win+ne, maintosh+ne but not with mac+ie?

thanx in advance

<SCRIPT Language="Javascript">

function printit(){
if (NS) {
window.print() ;
} else {
var WebBrowser = '<OBJECT ID="WebBrowser1" WIDTH=0 HEIGHT=0 CLASSID="CLSID:8856F961-340A-11D0-A96B-00C04FD705A2"></OBJECT>';
document.body.insertAdjacentHTML('beforeEnd', WebBrowser);
WebBrowser1.ExecWB(6, 2);
WebBrowser1.outerHTML = "";
}
}
</script>

<SCRIPT Language="Javascript">
var NS = (navigator.appName == "Netscape");
var VERSION = parseInt(navigator.appVersion);
if (VERSION > 3) {
document.write('<a href="#" onClick="printit()"><img src="stampa.gif" alt="Clicca qui per stampare questa pagina" border=0></a>');
}
</script>


</font>

That may just be a Windows/IE proprietary object you are using.