function highlightPage(){
    if(!document.getElementsByTagName) return false;
    if(!document.getElementById) return false;
    if(!document.getElementById('Mnav')) return false;
    var nav = document.getElementById('Mnav');
    var links = nav.getElementsByTagName('a');	
    var last = 0;
    for (var i=0;i<links.length;i++){
        var linkurl =  links[i].getAttribute('href');
        var currenturl = document.location.href;
            if(currenturl.indexOf(linkurl)!=-1){
                last = i; 
            }
    }
    links[last].className = 'now';
    return true;
}