- From: David Woolley <david@djwhome.demon.co.uk>
- Date: Tue, 19 Mar 2002 07:28:19 +0000 (GMT)
- To: w3c-wai-ig@w3.org
> Yes, but mapping the location object to links in the page would solve > that, even give you a choice, no need to implement any of those features. Mapping the location object, in that case, is potentially impossible, and in practice fairly difficult. It involves simultaneously executing all possible paths through the code. In the most general case, this is the halting problem, and is impossible in finite time, but in more practical cases it requires something other than a normal ECMA Script interpreter and rather more like (I think) Prolog, or a test coverage analysis tool. However, as much as anything, my point here was that, if you currently get a blank first page it probably means that the site authors believe that the site will be unuseable without browser specific extensions to DOM0, and will probably give a "please upgrade" page for the fallback case, if they have one. (Also, although document.all may have been implemneted by many minority browsers, it is for the same reason that Lynx would have to do it, namely that authors believe that there are only two brands of browser. As very few authors feature test for it, it also means forging the browser identity - something already common amongst Lynx users and which causes Lynx to be under-reported in statistics.)
Received on Tuesday, 19 March 2002 03:10:14 UTC