function seltab(bpref, hpref, id_max, selected) {
  if (! document.getElementById) return;
  for (i = 0; i <= id_max; i++) {
    if (! document.getElementById(bpref + i)) continue;
    if (i == selected) {
      document.getElementById(bpref + i).style.visibility = "visible";
      document.getElementById(bpref + i).style.position = "";
      document.getElementById(hpref + i).className = "open";
    } else {
      document.getElementById(bpref + i).style.visibility = "hidden";
      document.getElementById(bpref + i).style.position = "absolute";
      document.getElementById(hpref + i).className = "close";
    }
  }
}

function expand(URI,SUB,EXP){
  if(document.getElementById) {
    if(document.getElementById(SUB).style.display) {
      if(URI != 0) {
        document.getElementById(SUB).style.display = "block";
        document.getElementById(EXP).style.display = "none";
      } else {
        document.getElementById(SUB).style.display = "none";
        document.getElementById(EXP).style.display = "block";
      }
    } else {
      location.href = URI;
      return true;
    }
  } else {
    location.href = URI;
    return true;
  }
}