function externalLinks()
{
  if (!document.getElementsByTagName) return;
  var anchors = document.getElementsByTagName("a");
  for (var i=0; i<anchors.length; i++)
  {
    var anchor = anchors[i];
    if (anchor.getAttribute("href") && anchor.getAttribute("rel") == "external")
      anchor.target = "_blank";
  }
}
window.onload = externalLinks;


function clearValue(field)
{
  if (field.defaultValue == field.value)
    field.value = "";
}


function fillValue(field, text)
{
  if ((field.value.length==0) || (field.value==null))
  {
    field.value = text;
  }
}