function getArgs(location) {
  var args = new Object();
  var query = location.search.substring(1);
  var pairs = query.split("&");
  for (var i = 0; i < pairs.length; i++) {
    var pos = pairs[i].indexOf('=');
    if (pos == -1) continue;
    var argname = pairs[i].substring(0,pos);
    var value = pairs[i].substring(pos+1);
    args[argname] = unescape(value);
  }
  return args;
}
function GenQuerryString(QS) {
  var ans = "type=" + QS.type + "&model=" + QS.model + "&rgn=" + QS.rgn;
  ans = ans + "&graph=" + QS.graph + "&proj=" + QS.proj + "&date=" + QS.date;
  return ans;
}