// JScript File

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 null;
    }
    
    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));
}
function setDefaultQstring(name, val){
    var page=new PageQuery(window.location.search); 
    if (page.getValue(name)==null){
        if (page.q==null)
            window.location.replace(window.location.href + "?" + name + "=" + val)
        else
            window.location.replace(window.location.href + "&" + name + "=" + val)
    }
}