String.prototype.flashvideo = function(itemId) {
 if (typeof(flashWidth) == 'undefined') flashWidth = 640;
 if (typeof(flashHeight) == 'undefined') flashHeight = 480;
 if (typeof(flashId) == 'undefined') flashId = 'flashitem';
 var item = new FlashObject(this, flashId, flashWidth, flashHeight, "6");
 var mbody = document.getElementsByTagName('body')[0];
 $(itemId).style.display = 'block';
 item.write(itemId);
 $(itemId).innerHTML += '<br /><span style="cursor: pointer; text-decoration: underline; color: #FFFFFF;" id="textclose">Cliquez ici pour fermer la fenetre</span>';
 $('textclose').onclick = function() {
  $(flashId).remove();
  $(itemId).style.display = 'none';
  mbody.style.overflow = 'auto';
 }
 mbody.style.overflow = 'hidden';
 return true;
}