Questionnaires are written lists of questions that you distribute to your users. Questionnaires differ from surveys in that they are written lists, not ad hoc interviews, and as such require more effort on the part of your users to fill out the questionnaire. Often, questionnaires are used after sites are launched to assess customer satisfaction with the product. Such questionnaires often identify usability issues that should have been caught before the site goes live. Questionnaires are an inexpensive way of gathering a great deal of information from a large number of users. Most of the cost involved is in designing (or printing, if it's offline) the questionnaire.
Quirks Mode
Using an incomplete or outdated DOCTYPE - or no DOCTYPE at all - throws browsers into "Quirks" mode, where the browser assumes you have written old-fashioned, invalid markup and code per the depressing industry norms of the late 1990s. In this setting, the browser will attempt to parse your page in backward-compatible fashion, rendering your CSS as it might have looked in IE4, and reverting to a proprietary, browser-specific DOM .
