function ArrayTest() {

}

ArrayTest.prototype.getLength = function(properties, prop) {

	return properties[prop].length;

}

ArrayTest.prototype.setElementAt = function(properties, prop, idx, val) {

	properties[prop][idx] = val;

}

ArrayTest.prototype.getElementAt = function(properties, prop, idx) {

	return properties[prop][idx]

}

ArrayTest.prototype.setElementAtSub = function(properties, prop, idx, sub, val) {

	properties[prop][idx][sub] = val;

	// don't crash, even though "sub" isn't a real property

	properties[prop][idx].sub = val;

}

ArrayTest.prototype.getElementAtSub = function(properties, prop, idx, sub) {

	return properties[prop][idx][sub];

}

ArrayTest.prototype.resizeAndCheck = function(properties, prop, size) {

	properties[prop].length = size;

	return properties[prop].length;

}