Not all visually impaired people make use of technical support to navigate on the internet. The feature to increase fonts is an important element to ensure that all information of the website can be read by all users. Even people who are not visually impaired need to increase the font sometimes. At the same time, an increasing number of older people surf the web; they too need a feature to increase the font. To this purpose, it is important to define the font size not in pixel, but in percentage or "em".
Source and further information:
"Prioritizing Web Usability" by Jakob Nielsen/Hoa Loranger
Some font size (less than 5%) are fixed and cannot be increased, or a less ideal feature using Javascript is being used.
"Description" is used to summarise the content of a HTML-page as short and incisive as possible. The content of this meta information is not shown to the user in the internet browser, but search engines do use them to a certain extent to evaluate the relevance of a site for the results page.
The description summarises the content in one sentence. The summaries are normally shown on the results page of search engines and contribute a great deal to the choice of web users.
Further information:
http://de.selfhtml.org/html/kopfdaten/meta.htm#beschreibung
Descriptions are either incomplete or not optimised on the tested website. Verify that the homepage and the sub-pages contain an appropriate description (a short and incisive sentence).
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A potential hint has been identified.
The logical connection between definition and form field is missing if the form fields lack an explicit title.
This means that in the instance of a linear form, it is not apparent which definition belongs to which fiels. This is why the element LABEL was introduced with the attribute for, allowing the explicit definition for form fields.
Using the element LABEL allows Screen-Readerusers in particular to view the definition of the form field directly in the form field itself.
Source:
http://www.barrierefreies-webdesign.de/knowhow/formulare/label.html. Further information can be found in the W3C accessibility guidelines (12.4 Associate labels explicitly with their controls, Guideline 12, Accessibility Guidelines for Web Content 1.0, W3C recommendations 5th May 1999http://www.w3c.de/Trans/WAI/webinhalt.html) und http://de.selfhtml.org/html/formulare/strukturieren.htm.
Most, but not all, form fields on the tested website contain correct labels.
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A potential hint has been identified.
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A potential hint has been identified.
Alternative text is displayed if an image cannot be downloaded or if the mouse pointer is moved over the image*. The alternative text is on one hand important for visually impaired visitors, using an audio tool to read the content of the website and the alternative text of images.
On the other hand, alternative text can also be recognised by search engines. Alternative text needs to be phrased in a meaningful manner, though it should not be a detailed description of the image.
Further information:
http://www.bjoernsworld.de/html/alt-text.html
http://webdesign.crissov.de/alt-Text#Start
* Internet Explorer shows alternative text as a tooltip if the mouse pointer is rested on the image. This is not prohibited but it can annoy page authors. It does also indicate that the alt-attribute refers to this tooltip, which is wrong. Should you want to add a descriptive tooltip to your images, make use of the attribute "title".
Quelle: http://de.selfhtml.org/html/grafiken/einbinden.htm#referenz
The tested website contains alternative text for images, though the length of the alternative text is for one image at least outside the range between 8 and 80 characters. Alternative text which has correctly been recorded as empty will not return a negative result.
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A potential hint has been identified.
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A potential hint has been identified.
This test result is available for registered users and Premium Members.
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A potential hint has been identified.
This test result is available for registered users and Premium Members.
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A potential hint has been identified.