javascript url breaks w3c validation

The URL used to load the Google Maps API breaks the w3c validation of the page.

For example, the "tracker" page of my site is "valid" (it doesn't use GMap)
http://validator.w3.org/check?uri=http%3A%2F%2Fstasera.altervista.org%2F...

But the home page is not valid only because of that URL
http://validator.w3.org/check?uri=http%3A%2F%2Fstasera.altervista.org

You should replace every & with & in this URL