function namespace(ns, callback, parent){
	callback.call(ns.split('.').reduce(function(i, p){
		return (i[p] == null)? (i[p} = {}): i[p]
	}, parent || window));
}

namespace('mattn.hasegawayosuke.tokuhirom', function(){
	this.Miyagawa = function() {
		alert('ouffu')
	};
});

mattn.hasegawayosuke.tokuhirom.Miyagawa();