gistfile1.txt

var hasOwnProperty = Object.prototype.hasOwnProperty;

var equivalent = function(actual, expected) {
	if (actual === expected) {
		return true;
	}
	else if (expected instanceof Date) {
		if (actual instanceof Date && actual.getTime() == expected.getTime()) {
			return true;
		}
		else {
			return false;
		}
	}
	else if (typeof actual != "object" && typeof expected != "object") {
		return actual == expected;
	}
	else {
		if (actual.prototype !== expected.prototype) {
			return false;
		}
		
		var actualLength = 0, expectedLength = 0;
		for (var prop in actual) {
			if (hasOwnProperty.call(actual, prop)) {
				actualLength++;
				
				if (!hasOwnProperty.call(expected, prop) || !equivalent(actual[prop], expected[prop])) {
					return false;
				}
			}
		}
		
		for (var prop in expected) {
			if (hasOwnProperty.call(expected, prop)) {
				expectedLength++;
			}
		}
		
		return actualLength == expectedLength;
	}
};