Javascript HashCode Function

This function returns a hash code (MD5) based on the argument object. Please note that this implementation have some limitations (or features):

• Two instances of the same "Class" with the same internal state return the same hash code, i.e. they are equal:

  HashCode.value(new Object(arg)) === HashCode.value(new Object(arg)) // is True
  
  // but...
  
  function MyClass(value) {
      this.value = value;
  }
  
  c1 = new MyClass(99);
  c2 = new MyClass(99);
  
  HashCode.value(c1) === HashCode.value(c2); // is True
  c1 === c2; // is False

• 1 and 1.0 return the same code.
• x143 and 99 return the same code.

var object1 = [];
var object2 = { f1 : function() { var i; }, a : [1, 2, "#", { m : function() { return 1; } }]};
var object3 = object2;
var object4 = function(arg) { arg++ };
var object5 = function(arg) { arg++ }(2);
var object6 = (function(arg) { arg++ })(2);

HashCode.value(object1); // result: d41d8cd98f00b204e9800998ecf8427e
HashCode.value(object2); // result: e72b9ba8d4c160ab0d1b2a828359dde1
HashCode.value(object3); // result: e72b9ba8d4c160ab0d1b2a828359dde1
HashCode.value(object4); // result: 16619c0e50afd2695fc1a22dab652395
HashCode.value(object5); // result: be36fcbc3ab6342a7cbcb2e37d2ae78f
HashCode.value(object6); // result: be36fcbc3ab6342a7cbcb2e37d2ae78f