Javascript namespace

namespace.js

var YourGlobal = {
    namespace: function(ns) {
        var parts = ns.split("."),
            object = this,
            i, len;
        
        for(i = 0, len=parts.length; i < len; i++) {
            if(!object[parts[i]]){
                object[parts[i]] = {};
            }
            object = object[parts[i]];
        }
        
        return object;
    }
};

// Example
YourGlobal.namespace("Books.AboutJavascript");

YourGlobal.Books.AboutJavascript.author = "xxx";

YourGlobal.namespace("Books.OtherJavascript");

console.log(YourGlobal.Books.AboutJavascript.author);

YourGlobal.namespace("Books").ANewBook = {};