function pca_cell_rollover(cell, classname) {
  if (document.all || document.getElementById) {
    cell.classBackup = cell.className;
    cell.className   = classname;
  }
}

function pca_cell_rollout(cell)
{
  if (document.all || document.getElementById) {
    cell.className   = cell.classBackup;
  }
}

function open_window(name, url, left, top, width, height, toolbar, menubar, statusbar, scrollbar, resizable)
{
  toolbar_str = toolbar ? 'yes' : 'no';
  menubar_str = menubar ? 'yes' : 'no';
  statusbar_str = statusbar ? 'yes' : 'no';
  scrollbar_str = scrollbar ? 'yes' : 'no';
  resizable_str = resizable ? 'yes' : 'no';
  cookie_str = document.cookie;
  cookie_str.toString();
  pos_start  = cookie_str.indexOf(name);
  pos_end    = cookie_str.indexOf('=', pos_start);
  cookie_name = cookie_str.substring(pos_start, pos_end);
  pos_start  = cookie_str.indexOf(name);
  pos_start  = cookie_str.indexOf('=', pos_start);
  pos_end    = cookie_str.indexOf(';', pos_start);
  if (pos_end <= 0) pos_end = cookie_str.length;
  cookie_val = cookie_str.substring(pos_start + 1, pos_end);
  if (cookie_name == name && cookie_val  == "done")
    return;  window.open(url, name, 'left='+left+',top='+top+',width='+width+',height='+height+',toolbar='+toolbar_str+',menubar='+menubar_str+',status='+statusbar_str+',scrollbars='+scrollbar_str+',resizable='+resizable_str);
}

function preload_img()
{
  var img_list = preload_img.arguments;
  if (document.preloadlist == null)
    document.preloadlist = new Array();
  var top = document.preloadlist.length;
  for (var i=0; i < img_list.length-1; i++) {
    document.preloadlist[top+i] = new Image;
    document.preloadlist[top+i].src = img_list[i+1];
  }
}

function change_img_src(name, nsdoc, rpath, preload)
{
  var img = eval((navigator.appName.indexOf('Netscape', 0) != -1) ? nsdoc+'.'+name : 'document.all.'+name);
  if (name == '')
    return;
  if (img) {
    img.altsrc = img.src;
    img.src    = rpath;
  }
}

function restore_img_src(name, nsdoc)
{
  var img = eval((navigator.appName.indexOf('Netscape', 0) != -1) ? nsdoc+'.'+name : 'document.all.'+name);
  if (name == '')
    return;
  if (img && img.altsrc) {
    img.src    = img.altsrc;
    img.altsrc = null;
  }
}