<!--
function queryField(opt)
{
  var keyloc
  var nextkey
  var start
  var opts
  var optval

  opts = location.search
  keyloc = opts.indexOf("&" + opt + "=")
  if (keyloc == -1) {
    keyloc = opts.indexOf("?" + opt + "=")
  }
  if (keyloc == -1) {
    return ""
  }
  nextkey = opts.indexOf("&",keyloc+1)
  if (nextkey == -1) {
    nextkey = opts.length
  }
  if (nextkey < keyloc) {
    return ""
  }
  sval = keyloc+2+opt.length
  optval = plustospace(unescape(opts.substring(sval,nextkey)))
  return optval
}

function plustospace(txt)
{
  if (txt == "") { return txt }

  var newtxt=""
  var pos=0
  var prev=0
  var done=false
  var tmp

  while (!done) {
    pos = txt.indexOf("+",prev)
    if (prev >= txt.length) {
      done = true
    }
    else if (pos == 0) {
      prev=1
      newtxt += " "
    }
    else if ((pos < 0) || (pos == "")) {
      done = true
    }
    else {
      if (pos>prev) { newtxt += txt.substring(prev,pos) }
      newtxt += " "
      prev=pos+1
    }
  }
  newtxt += txt.substring(prev,txt.length)
  return newtxt
}
//-->