The example website is manuscript central: eg: http://mc.manuscriptcentral.com/ele
It does not appear to use the html autocomplete blocking tag.
Preventing the autocompletion of fields and saving passwords is achieved using the
One work around (just tested in firefox) is to use firebug to temporarily insert a submit button into the form, and click it. While this does not actually submit the form it does cause the prompt to save to appear, allowing the credentials to be saved and populated next time.
With firefox and firebug extension installed (other browsers have similar extensions or features), right click the userid field and inspect element. Choose right click the
It should appear like this:
Enter your userid and password, taking care not to hit Enter.