Error when using jQuery 1.4.1, Prototype 1.6.1, jqPlot, and IE8

[johnlicheng]

Steps to reproduce:

Unzip attached file and open example1/index.html. Go to the 2nd test in IE 8 and you will see an error.

Expected result:

No errors

Actual result:

Error message "TypeError: 'document.documentElement' is null or not an object"

Description:

I've included a test case where IE throws a TypeError: document.documentElement is null... when using jQuery 1.4.1 with Prototype 1.6.1 and jqPlot, but the error does not occur when jQuery 1.3.2 is used (or if Prototype 1.6 is used).

This tells me that something in jQuery 1.4.1 and Prototype 1.6.1 are conflicting with each other.

[dmethvin]

Please reduce to a simpler test case. Since prototypejs is involved it most likely is caused by pollution of the global name space or Object prototype.