function loading_link(node)
{
  if (!node) return false;
  if (typeof node == 'string')
    node = document.getElementById(node);
  if (node) node.innerHTML = '<img src="/images/loadinganimation.gif" id="loading_img" style="float: left"/>' + node.innerHTML
}

function loaded_link(node)
{
  if (!node) return false;
  if (typeof node == 'string')
    node = document.getElementById(node);
    var removed = node.removeChild(node.childNodes[0]);
}

function scroll()
{
  new Effect.ScrollTo('header', {duration: .2})
}