function setCurrentPage()
{ 
    var page = location.href.substring(location.href.lastIndexOf('/') + 1);
    page = page.substring(0, 8);
    if (page == "irmdirec")
        document.getElementById('primary_find').style.background = "url(images/primary_navOn.jpg) no-repeat -670px 0px";
    else if (page == "irmevent")
    {
        document.getElementById('primary_news').style.background = "url(images/primary_navOn.jpg) no-repeat -538px 0px";
    }
    else
    {
        document.getElementById('primary_membership').style.background = "url(images/primary_navOn.jpg) no-repeat -215px 0px";
    }
}