Is it possible to use JavaScript to change the meta-tags of the page?

Question

If I put a div in the head and display:none, than use JavaScript to display it, will this work?

Edit:

I have stuff loaded in AJAX. And as my AJAX changes the

Answer 1

You'd use something like (with jQuery):

$('meta[name=author]').attr('content', 'New Author Name');

But that would be mostly pointless as meta tags are usually only scraped when the document is loaded, usually without executing any JavaScript.