NOTE: These results should NOT be taken as authoritative. DOCTYPE switching is a tricky thing to test. Consider the following information a rough guide at best, and subject to change as further testing warrants. Thank you.
| Entry | Meaning |
|---|---|
| Q | Quirks mode |
| S | Strict mode |
| - | Status unknown |
Last modified Friday 5 April 2002 12:47:02 (Eastern U.S.)
| DOCTYPE given | NN6.01 | NN6.1 | NN6.2.x | Moz0.9.9 | IE5/Mac | IE6/Win |
|---|---|---|---|---|---|---|
| No DOCTYPE given | Q | Q | Q | Q | Q | Q |
| Unrecognized DOCTYPE | Q | Q | Q | S | S | S |
| Unrecognized DOCTYPE + URI | Q | Q | Q | S | S | S |
| HTML 2.0 | Q | Q | Q | Q | Q | Q |
| HTML 3.0 | Q | Q | Q | Q | Q | Q |
| HTML 3.2 | Q | Q | Q | Q | Q | Q |
| HTML 3.2 + URI | Q | Q | Q | Q | Q | Q |
| HTML 4.0 Strict | S | S | S | S | S | S |
| HTML 4.0 Strict + URI | S | S | S | S | S | S |
| HTML 4.0 Transitional | Q | Q | Q | Q | Q | Q |
| HTML 4.0 Transitional + URI | Q | Q | Q | Q | S | S |
| HTML 4.0 Frameset | Q | Q | Q | Q | Q | Q |
| HTML 4.0 Frameset + URI | Q | Q | Q | Q | S | S |
| HTML 4.01 Strict | S | S | S | S | Q | S |
| HTML 4.01 Strict + URI | S | S | S | S | S | S |
| HTML 4.01 Transitional | Q | Q | Q | Q | Q | Q |
| HTML 4.01 Transitional + URI | S | S | S | S | S | S |
| HTML 4.01 Frameset | Q | Q | Q | Q | Q | Q |
| HTML 4.01 Frameset + URI | S | S | S | S | S | S |
| Valid XHTML | S | S | S | S | S | S |
| Valid XHTML + URI | S | S | S | S | S | S |
| Valid XHTML w/ XML | S | S | S | S | S | Q |
| Valid XHTML w/ XML + URI | S | S | S | S | S | Q |
| Any XML | S | S | S | S | S | - |
| Any XML + URI | S | S | S | S | S | - |