title: Jquery Select meta[property=og:image]?
body: <p>I want to select in Jquery the main photo in a web page, I just have the url page.
  so I decided to use the meta written for Facebook sharing.</p>
  
  <p>I want to select the content of : 
  meta property="og:image" content="http://blablabla.jpg" </p>
  
  <p>I wrote this, but it doesn't work:
      $("meta[property=og:image]").attr("content");</p>
  
  <p>Any ideas ?
  Thank you</p>