/* Client-side access to querystring name=value pairs
   Version 1.2.3
   22 Jun 2005
   Adam Vandenberg
*/
function Querystring(qs) { // optionally pass a querystring to parse
   this.params = new Object()
   this.get = function(key, default_)
   {
      // This silly looking line changes UNDEFINED to NULL
      if (default_ == null) default_ = null;
      
      var value=this.params[key]
      if (value==null) value=default_;
      
      return value
   };
   
   if (qs == null)
      qs=location.search.substring(1,location.search.length)

   if (qs.length == 0) return

// Turn <plus> back to <space>
// See: http://www.w3.org/TR/REC-html40/interact/forms.html#h-17.13.4.1
   qs = qs.replace(/\+/g, ' ')
   var args = qs.split('&') // parse out name/value pairs separated via &
   
// split out each name=value pair
   for (var i=0;i<args.length;i++) {
      var value;
      var pair = args[i].split('=')
      var name = unescape(pair[0])

      if (pair.length == 2)
         value = unescape(pair[1])
      else
         value = name
      
      this.params[name] = value
   }
}

function Querystring_get(key, default_) {
   // This silly looking line changes UNDEFINED to NULL
   if (default_ == null) default_ = null;
   
   var value=this.params[key]
   if (value==null) value=default_;
   
   return value
}