function star(linktag) {
    //linktag.style.background='red';
    linktag.className += " navTreeCurrentItem";
}

var href = document.location.href ;
var links = document.getElementsByTagName('a');
for (var i=0; i<links.length; i++) {
    var link = links[i];
    if (link.href == href) star(link);
}