v1.2; exception is thrown in attempt to dump XMLDOM object in IE browser

[GoogleCodeExporter]

What steps will reproduce the problem?
$.ajax({url: "root.xml", dataType: "xml"})
.success(function (data, textStatus, xhr) {
  $.dump(data, 1, "data");
});

What is the expected output?
IE browser doesn't iterate thru the properties of XMLDOM object so empty object 
dump should be displayed

What do you see instead?
A javascript exception "Object doesn't support this property or method" at line 
38:
  if (/^off$/i.test(obj)) { __jqdump__dump_OFF = true; }

The bug rises at $.dump(...) function usage under described sircumstances, 
$("selector").dump(...) not affected.

The issue is fixed in v1.3 by changing target line to:
  if (typeof(obj) == "string" && /^off$/i.test(obj)) { __jqdump__dump_OFF = true; }

Original issue reported on code.google.com by CAlexBlock@gmail.com on 12 Jan 2012 at 1:14