function shareFacebook() {

  if (shareUrl == null || shareUrl == undefined || shareUrl == '') {
    shareUrl = location.href;
  }
    
  var targetUrl = 'http://www.facebook.com/sharer.php?u=' + 
      encodeURIComponent(shareUrl) + 
      '&t=' + encodeURIComponent(document.title);

  window.open(targetUrl,'sharer','toolbar=0,width=626,height=436');
}


function shareMySpace() {

  if (shareUrl == null || shareUrl == undefined || shareUrl == '') {
    shareUrl = location.href;
  }

  document.getElementById('myspace_posting_form').submit();
}


function shareDelicious() {

  if (shareUrl == null || shareUrl == undefined || shareUrl == '') {
    shareUrl = location.href;
  }

  var targetUrl = 'http://delicious.com/post?v=4&noui&jump=close' +
      '&url=' + encodeURIComponent(shareUrl)     +
      '&title=' + encodeURIComponent(shareTitle) + 
      '&notes=' + encodeURIComponent(shareContent);

  window.open(targetUrl,'sharer','toolbar=0,width=650,height=436');
}


function shareMeneame() {

  if (shareUrl == null || shareUrl == undefined || shareUrl == '') {
    shareUrl = location.href;
  }

  var targetUrl = 'http://meneame.net/submit.php?url=' +
      encodeURIComponent(shareUrl);

  window.open(targetUrl);
}