[Crazy]

Попробуй:

<script>
var cookieEnabled=(navigator.cookieEnabled)? true : false
if (typeof navigator.cookieEnabled=="undefined" && !cookieEnabled){ 
  document.cookie="testcookie";
  cookieEnabled=(document.cookie=="testcookie")? true : false;
  document.cookie="";
}

if (cookieEnabled)
  alert('enabled');

</script>