Bug 8107 Fix And Proper Unit-tests ( Try #2 )

[danheberden]

Remember that one time I submitted this pull-req and hadn't pulled from upstream master prior? OMG those were the days!

Allows all the 1.4/1.5 forms of calling $.ajax() to work in all their glory (added a test case too):

$.ajax();
$.ajax( {} );
$.ajax( 'url' );
$.ajax( 'url', {} );

[jaubourg]

The test should be put much higher in the unit tests (right after the first success unit test actually), the fix will not work with document.location use as a url (while we support it as the url parameter in options so it should at least be documented).

[danheberden]

I was wondering about that - as stated in the documentation, the url as the first param is of type String. The support for document.location in the options object remains.