1 Test for Bugzilla bug: 90341: createAttribute/setAttributeNode does not properly normalize case.
2 This test verifies that the setAttributeNode() API allows for creation of attributes case-sensitively for XHTML documents. Thus two different attributes with the same name but in different case can exist for XHTML documents.
4 style attribute value = background-color: red and STYLE attribute value = background-color: green