嗨，我正在尝试使用facebook共享按钮来共享当前的post permalink页面，但没有任何效果。有人帮忙吗？

  <?php var $perma = \'<?= get_the_permalink(); ?>\';?>
  <a href="javascript:fbShare(\'<?php echo $perma ?>\', \'FB Share\', \'Facebook share popup\', \'<?php echo $perma ?>\', 520, 350)">Share</a>

   function fbShare(url, title, descr, image, winWidth, winHeight) {
    var winTop = (screen.height / 2) - (winHeight / 2);
    var winLeft = (screen.width / 2) - (winWidth / 2);
    window.open(\'http://www.facebook.com/sharer.php?s=100&p[title]=\' + title + \'&p[summary]=\' + descr + \'&p[url]=\' + url + \'&p[images][0]=\' + image, \'sharer\', \'top=\' + winTop + \',left=\' + winLeft + \',toolbar=0,status=0,width=\' + winWidth + \',height=\' + winHeight);
   }