Object's Prototype Variable Inheritance

I'm looking to do something like this:

function superDuperObject(range) {
this.startContainer = new superDuperObjectStartContainer(range);
}

function superDuperObjectStartContainer(range) {
this.calculatedContainerNumber = doSomethingAndGetSomethingBack(range);
return range.startContainer
}

function doSomethingAndGetSomethingBack(range) {
return
someCoolInformationThatICalculateInThisFunctionTha tNeedsTheRange;
}

var myObject = new
SuperDuperObject(DOMRangeObjectThatIDefindedEarlie rInCode);

// Show me the startContainer of
"DOMRangeObjectThatIDefindedEarlierInCode"
alert(myObject.startContainer);

// Show me the calculatedContainerNumber that I get from a function
that does stuff with the range passed to it
alert(myObject.startContainer.calculatedContainerN umber);