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 "";
    }
    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; } 
}

function queryString(key)
{
    var page = new PageQuery(window.location.search); 
    return unescape(page.getValue(key)); 
}

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