Internet Explorer 4 and 5 can display thousands of characters from dozens of alphabets specified by numeric codes in the html source. From 32 to 127 these are the same as ascii codes. Navigator 4 can display some Unicode characters as well, but only up to character , apparently. If anyone knows where Netscape have documented this, please let me know (HTML only specifies character codes up to 255). To see a range of html codes with their matching characters for your browser, put a lower and upper number in the fields and click on the button. Don't ask for too big a range - it could take a long time to render (Netscape renders faster than Explorer, but it's limited to unicodes).
Sadly (but truly), Netscape doesn't render Central European characters in a Javascript document.write (which is how this page works); so not only is Netscape limited to unicodes up to , but this generator won't display all of them anyway (if you're using Navigator). If you really want to see the Navigator special characters up to , look at this page.