function showPic (whichpic) {
if (document.getElementById) {
 document.getElementById('placeholder').src = whichpic.href;
 if (whichpic.title) {
  document.getElementById('caption').childNodes[0].nodeValue = whichpic.title;
 } else {
  document.getElementById('caption').childNodes[0].nodeValue = whichpic.childNodes[0].nodeValue;
 }
 return false;
} else {
 return true;
}
}