// This example is from the book _JavaScript: The Definitive Guide_.    
// Written by David Flanagan.  Copyright (c) 1996 O'Reilly & Associates.
// This example is provided WITHOUT WARRANTY either expressed or implied.
// You may study, use, modify, and distribute it for any purpose.        

// This is the function we'll use for the assign() method.
function myassign(rhs) {
    var i;
    for (i in rhs) this[i] = rhs[i];
}

myobject = new Object;       // Create an object.
myobject.assign = myassign;  // Set the custom assign() method on it.

// Now, when an object is assigned to "myobject", the properties
// of that object are copied, rather than overwriting the "myobject"
// variable with a reference to the other object.
myobject = my_other_object;
	  
// after the above assignment, myobject and my_other_object still refer
// to two separate objects, but myobject has a copy of each of the 
// properties of my_other_object.