function extractPageName(hrefString)
{
        var arr = hrefString.split('/');
        return  (arr.length<2) ? hrefString : arr[arr.length-2].toLowerCase() + arr[arr.length-1].toLowerCase();                
}

function setActiveMenu(arr, crtPage)
{
        for (var i=0; i<arr.length; i++)
        {
                if(extractPageName(arr[i].href) == crtPage)
                {
                        if (arr[i].parentNode.tagName != "DIV")
                        {
                                arr[i].className = "currentpage";
                                arr[i].parentNode.className = "currentpage";
                        }
                }
        }
}

function setPage()
{
        hrefString = document.location.href ? document.location.href : document.location;

        if (document.getElementById("nav")!=null) 
                setActiveMenu(document.getElementById("nav").getElementsByTagName("a"), extractPageName(hrefString));