HTML Ordered List Element (OL)

Here is a set of nested lists without the TYPE attribute set

1. item one
   1. level 2, item one
   2. level 2, item two
   3. level 2, item three
      1. level 3, item one
         1. level 4, item one
         2. level 4, item two
         3. level 4, item three
      2. level 3, item two
      3. level 3, item three
2. item two
   1. level 2, item one
   2. level 2, item two
      1. level 3, item one
      2. level 3, item two
      3. level 3, item three
   3. level 2, item three
3. item three