====== copy prototype ======
This is a function to allow basic inheritance.  You can have a parent class, and a descendant class which inherits all prototype components of the parent class.

<code javascript>
function copyPrototype(descendant, parent) {
    var sConstructor = parent.toString();
    var aMatch = sConstructor.match( /\s*function (.*)\(/ );
    if ( aMatch != null ) { descendant.prototype[aMatch[1]] = parent; }
    for (var m in parent.prototype) {
        descendant.prototype[m] = parent.prototype[m];
    }
};
</code>

===== External Links =====
  * http://www.sitepoint.com/blogs/2006/01/17/javascript-inheritance/