The entity name must immediately follow the '&' in the entity reference

I want to put a packman game on my *.xhtml page.(I am using jsf 2 and primefaces 3.5)

However,

when I "translated" the html page in xhtml I get an error at this script:

    <script>

    var el = document.getElementById("pacman");

    if (Modernizr.canvas && Modernizr.localstorage && 
        Modernizr.audio && (Modernizr.audio.ogg || Modernizr.audio.mp3)) {
      window.setTimeout(function () { PACMAN.init(el, "./"); }, 0);
    } else { 
      el.innerHTML = "Sorry, needs a decent browser<br /><small>" + 
        "(firefox 3.6+, Chrome 4+, Opera 10+ and Safari 4+)</small>";
    }
  </script>

At line:

if (Modernizr.canvas && Modernizr.localstorage && 

i get:

The entity name must immediately follow the '&' in the entity reference.

Any idea how to fix that?