StyleSheetList
The items in the StyleSheetList are accessible via an integral index, starting from 0.
See also the Document Object Model (DOM) Level 2 Style Specification.
The number of StyleSheets in the list. The range of valid child stylesheet indices is 0 to length-1 inclusive.
StyleSheets
0
length-1
Used to retrieve a style sheet by ordinal index. If index is greater than or equal to the number of style sheets in the list, this returns null.paramindexIndex into the collectionreturnThe style sheet at the index position in the StyleSheetList, or null if that is not a valid index.
null
index