I'm using FB.ui to share a page to Facebook and I'm trying to set the title and message (image if possible but not important). I have this in my site header

<meta property=og:title content=Your title here />

<meta property=og:description content=your description here />

And my javascript code is

FB.ui({

      method: 'share',

      href: document.URL,

    }, function(response){



        //TODO Proper response handling

        log(response); 

        if (typeof response != 'undefined') {

            alert('Thanks for sharing');

        }

    }); 

From what I've read I just need to og:titleand og:description to set the title and message, but that doesn't seem to work.

Current the title is either coming from part of the part title, or an alt tag on an image, and the message is being populated from just a random paragraph tag.