function queryString(qs) { 
	this.params = new Object()
	this.get=queryString_get
	
	if (qs == null)
		qs=location.search.substring(1,location.search.length)

	if (qs.length == 0) return

	qs = qs.replace(/\+/g, ' ')
	var args = qs.split('&') 
	
	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
}
function xGetElementById(e)
{
  if(typeof(e)=='string') {
    if(document.getElementById) e=document.getElementById(e);
    else if(document.all) e=document.all[e];
    else e=null;
  }
  return e;
}