Namespace Pattern #2 (81 chars)

vanilla-namespace-2.js

//namespace patter #2 - with comments
this.n = function(namespace, namespaceItem, lastObject, namespaceList) {
    lastObject = this;
    namespaceList = namespace.split('.');
    
    while(namespaceItem = namespaceList.shift()) {
        lastObject = lastObject[namespaceItem] = lastObject[namespaceItem]||{};
    }
}


//namespace patter #2 - obfuscated (81 chars)
this.n=function(a,b,c,d){for(c=this,d=a.split(".");b=d.shift();)c=c[b]=c[b]||{}};

//namespace patter #2 - usage
n("system.drawing");
system.drawing.doIt = function(){};
n("system.net");
system.net.constant = "const";

console.log(system.drawing.doIt);
console.log(system.net.constant);