Based on the Prototype namespacing made easy, except this doesn't require Prototype.
String.prototype.namespace = function(separator) {
var ns = this.split(separator || '.'), p = window, i;
for (i = 0; i < ns.length; i++) {
p = p[ns[i]] = p[ns[i]] || {};
}
};
This isn't so much to ditch Prototype, but to encourage using namespacing.

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