function switchid(id){
  hideallids();
  showdiv(id);
}

function hideallids(){
  //loop through the array and hide each element by id
  for (var i=0;i<ids.length;i++){ hidediv(ids[i]); }
}

function hidediv(id) {
  //safe function to hide an element with a specified id
  if (document.getElementById) { // DOM3 = IE5, NS6
    document.getElementById(id).style.display = 'none';
  } else {
    if (document.layers) { // Netscape 4
      document.id.display = 'none';
    } else { // IE 4
      document.all.id.style.display = 'none';
    }
  }
}

function showdiv(id) {
//safe function to show an element with a specified id

  if (document.getElementById) { // DOM3 = IE5, NS6
    document.getElementById(id).style.display = 'block';
  } else {
    if (document.layers) { // Netscape 4
      document.id.display = 'block';
    } else { // IE 4
      document.all.id.style.display = 'block';
    }
  }
}