function over_o(pos_o,name_o){
  if (window.parent.lastclickp==pos_o){}
  else document.images[pos_o].src='../images/'+name_o+'_o.gif';
}

function press(pos_o,name_o){
  if (window.parent.lastclickp!=null) document.images[window.parent.lastclickp].src='../images/'+window.parent.lastclickn+'.gif';
  document.images[pos_o].src='../images/'+name_o+'_o.gif';
  window.parent.lastclickp=pos_o;
  window.parent.lastclickn=name_o;
}

function uncolored(pos_uc,name_uc){
  if (window.parent.lastclickp==pos_uc){}
  else document.images[pos_uc].src='../images/'+name_uc+'.gif';
}