Q1544 How can I provide a translate button to invoke AltaVista's Babel Fish to translate a page from English to French?

<form>
<input type="button" value="Translate"
onClick="loc = 'http://jump.altavista.com/trans.go?urltext=';
loc += escape('http://www.irt.org/');
loc += '&lp=en_fr';
window.location=loc;">
</form>