jQuery.fn.conditionalHide = function(options) {
    var settings = {
        month: '3',
        year: '2009'
    }
    if (options) jQuery.extend(settings, options);
    return this.each(function() {
        var me = jQuery(this);
        var month = jQuery(this).getUrlParam("month");
        var year = jQuery(this).getUrlParam("year");
        function init() {
            if(month != null && year != null)
                if ((year < settings.year) || ((year == settings.year) && (month < settings.month)))
                    me.hide();
        }
        init();
    });
}