attr() returns "undefined" for rowspan and colspan for cells where they aren't explicitly set

[anonymous]

For all browsers besides Internet Explorer I tested, jQuery 1.6 will return undefined when getting colspan or rowspan for a td where it isn't explicitely set. In Internet Explorer browsers the return value is 1, which is the way it used to be in all browsers prior to jQuery 1.6.

Tested browsers were Firefox versions 3.6 and 4.0, Opera 11, Chrome 11, IE 6, 7 and 8.

[Timmy Willison]

This is the expected behavior as of jQuery 1.6, which removes the ambiguity between attributes and properties. If the attribute has not been set, attr will return undefined, but prop will return the corresponding property. The docs have been updated and please check out the new ​prop method.