var request = {
    QueryString: function(val){
        var uri = window.location.search;
        var re = new RegExp("" + val + "\=([^\&\?]*)", "ig");
        return ((uri.match(re)) ? (uri.match(re)[0].substr(val.length + 1)) : null);
    },
    QueryStrings: function(){
        var uri = window.location.search;
        var re = /\w*\=([^\&\?]*)/ig;
        var retval = [];
        while ((arr = re.exec(uri)) != null) 
            retval.push(arr[0]);
        return retval;
    },
    setQuery: function(val1, val2){
        var a = this.QueryStrings();
        var retval = "";
        var seted = false;
        var re = new RegExp("^" + val1 + "\=([^\&\?]*)$", "ig");
        for (var i = 0; i < a.length; i++) {
            if (re.test(a[i])) {
                seted = true;
                a[i] = val1 + "=" + val2;
            }
        }
        retval = a.join("&");
        return "?" + retval + (seted ? "" : (retval ? "&" : "") + val1 + "=" + val2);
    }
}