function addToFavourites(nid, uri) {
  var block = $('addtofavourites');
  block.innerHTML = '<img src="ajax-loader.gif">';
  HTTPGet(uri, update_block);
}

function removeFromFavourites(nid, uri) {
  var block = $('addtofavourites');
  block.innerHTML = '<img src="ajax-loader.gif">';
  HTTPGet(uri, update_block);
}


function update_block(ajaxString, ajaxResult) {
  var block = $('addtofavourites');
  block.innerHTML = ajaxString;
}