// highlight current nav item
var nav = document.getElementById("nav");
var a = nav.getElementsByTagName("a");
// find current category 
var current_category = window.location.href;
current_category = current_category.substring(current_category.indexOf('.com/')+4);// '/%category%/%item%.html#...'
current_category = current_category.substr(0,current_category.lastIndexOf('/')+1);// '/%category%/'
if (current_category=='/') {
    (window.location.href.indexOf('about')!='-1')?current_category = 'about':current_category = 'index';
}
for(var i=0;i<a.length;i++){
    // actual link
    var link = a[i].href.split(".com")[1];
    if (link.indexOf(current_category)!=-1) {
        var aParent = a[i].parentNode;
        if (!aParent.className) {
            aParent.className = 'cur';
        }
        else {
            newClassName = aParent.className;
            newClassName+= ' ';
            newClassName+= 'cur';
            aParent.className = newClassName;
        }
    }
}