Stylesheet titles are read-only

In IE8 Standards mode and below you can change the value of a styleSheet object's title. In IE9 Standards mode mode the write command will be ignored and the original value will remain.

The value of a styleSheet object's title is read-only IE8 mode but not in later document modes.

If you have to change a styleSheet object's title, you can do so by changing the title attribute on the link element or style element that contains the styleSheet.