/* gallery arrow images code*/
left_arrow_off = new Image();
left_arrow_off.src = "new_images/icon.left_arrow.on.gif";
left_arrow_on = new Image();
left_arrow_on.src = "new_images/icon.left_arrow.off.gif";

right_arrow_off = new Image();
right_arrow_off.src = "new_images/icon.right_arrow.on.gif";
right_arrow_on = new Image();
right_arrow_on.src = "new_images/icon.right_arrow.off.gif";

function galleryOver(id_num) {
  var doc_id =  "photo" + id_num;
  document.getElementById(doc_id).className  = 'news_image_over';
}
function galleryOut(id_num) {
  var doc_id =  "photo" + id_num;
  document.getElementById(doc_id).className = 'news_image';
}

function setGalleryPhoto(id_num, newSource, newTitle, newCaption){
  galleryOver(id_num);
  // set photo
  document.getElementById("gallery_photo_image").src = newSource;
  // set title
  var title_span = document.getElementById("gallery_photo_title");
  var oldText = title_span.childNodes.item(0);
  var newText = document.createTextNode(newTitle);
  var replaced = title_span.replaceChild(newText,oldText);
  // set caption
  var caption_span = document.getElementById("gallery_photo_caption");
  var oldText = caption_span.childNodes.item(0);
  var newText = document.createTextNode(newCaption);
  var replaced = caption_span.replaceChild(newText,oldText);
  // set current photo to white border
  //var doc_id =  "photo" + id_num;
  //document.getElementById(doc_id).className  = 'white_border';
}