function Hashtable_put(key, val)
{
  for (var i = 0; i < this.keys.length; i++)
  {
    if (this.keys[i] == key)
    {
      this.vals[i] = val;
      return val;
    }
  }
  this.keys[this.keys.length++] = key;
  this.vals[this.vals.length++] = val;
  return val;
}
function Hashtable_get(key)
{
  for (var i = 0; i < this.keys.length; i++)
  {
    if (this.keys[i] == key) return this.vals[i];
  }
  return null;
}

function Hashtable_getKeys()
{
  return this.keys;
}
function Hashtable_getValues()
{
  return this.vals;
}
function Hashtable()
{
 this.keys = new Array();
 this.vals = new Array();
 this.put = Hashtable_put;
 this.get = Hashtable_get;
 this.getKeys = Hashtable_getKeys;
 this.getValues = Hashtable_getValues;
 return this;
}