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function Class (ns) {
this.toString = function () { return ns; };
}
Class.def = function (ns, ctx) {
var c  = window;
var ns = ns.split('.');
for (var i = 0, ix = ns.length - 1; i < ix; i++)
c = c[ns[i]] instanceof Object ? c[ns[i]] : c[ns[i]] = {};

if (!(ctx.init instanceof Function)) ctx.init = function () {};
c = c[ns[i]] = function () { this.constructor.apply(this, arguments); };
c.prototype             = new Class(ns.join('.'));
c.prototype.constructor = ctx.init;
for (var key in ctx) if (ctx.hasOwnProperty(key)) {
if (key != 'init') c.prototype[key] = ctx[key];
}

return c;
};

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