/*
  Class used to work with the command line parameters passed to a page
*/

function PageQuery(q) 
{
  if(q.length > 1) 
    this.q = q.substring(1, q.length);
  else 
    this.q = null;
  
  this.keyValuePairs = new Array();
  if(q) 
  {
    for(var i=0; i < this.q.split("&").length; i++) 
	{
      this.keyValuePairs[i] = this.q.split("&")[i];
    }
  }
  this.getKeyValuePairs = function() 
  { 
    return this.keyValuePairs; 
  }

  this.getValue = function(s) 
  {
    for(var j=0; j < this.keyValuePairs.length; j++) 
	{
      if(this.keyValuePairs[j].split("=")[0] == s)
        return this.keyValuePairs[j].split("=")[1];
    }
    return false;
  }
  
  this.getParameters = function() 
  {
    var a = new Array(this.getLength());
    for(var j=0; j < this.keyValuePairs.length; j++) 
	{
      a[j] = this.keyValuePairs[j].split("=")[0];
    }
    return a;
  }
  
  this.getLength = function() 
  { 
    return this.keyValuePairs.length; 
  }
} // PageQuery

function queryString(key)
{
  var page = new PageQuery(window.location.search);
  
  var key_val = page.getValue(key); // Get valu from query string
  if(key_val != false)
    key_val = unescape(key_val) ;
  
  return key_val ;
} // queryString

function displayItem(key)
{
  if(queryString(key)=='false') 
  {
    document.write("you didn't enter a ?name=value querystring item.");
  }
  else
  {
    document.write(queryString(key));
  }
} // displayItem