Help on Operation

  1. For Which Browsers?
  2. Navigation
  3. Key Access
  4. Symbols Used
  5. Abbreviations and Acronyms
  6. Usage and Properties of pop-up windows
  7. Does Javascript or Java have to be absolutely enabled?
  8. Usage of Cookies
  9. Printing
  10. Usage of XHTML
  11. Usage of Style Sheets
  12. Usage of Unicode
  13. Usage of SVG
  14. Plug-Ins for Media Presentation
  15. Search Tool

For Which Browsers?

The pages are arranged in such a way that they can be viewed, in principle, with all browsers. Naturally, one must make compromises: in particular the layout does not look any longer as well as in the case of older browsers. The consideration of the operation characteristics of newer browsers happens, if necessarily, only after previous tests by means of Javascript scripts.

Modern browsers can be downloaded from the Web (Note: the following links will be opened in a new browser window):


Navigation elements are in the heading underneath the title “Roland Unger” (or similiar) which can be retrieved in the same way on each page.

On the left side you recognise the hierarchy structure (so called bread-crumbs trail), the hierarchy structure level can be discerned by the sign “>”.

On the right side there are important tools, so e.g. the possibility to change between German and English versions, the link to the table of contents (also site map) and a link to this help page. The individual tools are separated with the delimiter “|”.

There is a navigation bar on the left side of each page. It contains important links to similar pages, but not all possible links. The links are selected in such a manner that they refer to the information presented. The links are subdivided into logical groups. In any case, the two topmost links always lead up to the home page and/or table of contents.

On extensive pages you will find a page’s table of contents underneath the main title. You can achieve faster certain information on the page with this tool.

The table of contents (also site map), which is attainable from all pages, lists all pages of the sub-site of this Web site.

Key Access

Some frequently used or important links are additionally attainable using a special key combination (also access keys). These links can be seen from the coloured emphasized letter and/or a number of the writing. You will reach this link if you press the Alt key as well as the key specified by the coloured letter/number. Note that this feature is available only in the case of the Internet Explorer 5.5, Netscape 6.0 and/or Mozilla and upwards.

If you use the Opera browser, then you can activate key combinations mentioned (HTML key access) press first the Shift and Esc keys together, release them, and then press the marked letter and/or number.

Often used access keys are listed in the following table:

List of often used access keys:
Access Keys Meaning
Alt + Shift + F Feedback
Alt + Shift + G German Version
Alt + Shift + H To the Help page (this page)
Alt + Shift + I Site Index
Alt + Shift + N Next Page
Alt + Shift + O To the Homepage of Roland Unger
Alt + Shift + P Previous Page
Alt + Shift + S Search
Alt + Shift + T To the top of the current document.

However, the key combinations mentioned are applicable only if the information window can possess the focus. It will be tried by Javascript that this is the rule. Otherwise it can be achieved by a short click with the mouse on this desktop area.

It cannot be avoided however that these key combinations collide with key combinations of the browser menu bar. As long as the information window is focused, the key combinations are only catched and used by the information window itself. With the key combinations Ctrl + Tab you can move the focus on the URL input line; all key combinations entered now will be sent to the Browser menu line.

Numbers used in key combinations are for use for the tables of contents of the current page. Its first nine entries can be reached with the appropriate key combinations.

Symbols Used

List of the symbols used:
Symbol Meaning
Symbol: Site or subsite with substructures, respectively. Site or subsite with substructures, respectively.
Symbol: Site or subsite, respectively. Site or subsite, respectively.
Symbol: Single page Single page.
Symbol: Reference to another place of the current page Reference to another place of the current page.
Symbol: Reference to a target within this site Reference to a target within this site. This symbol is only used if necessary.
Symbol: Reference to a target out of this site Reference to a target out of this site.
Symbol: Reference to the top of the current page. Reference to the top of the current page.
Symbol: Reference to the bottom of the current page Reference to the bottom of the current page.
Symbol: Reference to the next page Reference to the next page.
Symbol: Reference to the last page Reference to the last page.
Symbol: Reference to the previous page Reference to the previous page.
Symbol: Reference to the first page Reference to the first page.
Symbol: Feedback, email Feedback, email.
Symbol: Link to a German page, or the page is available only in German Link to a German page, or the page is available only in German.
Symbol: Link to an English page, or the page is available only in English Link to an English page, or the page is available only in English.

Abbreviations and Acronyms

Less well-known abbr and acronyms – these are words compounded from the initial letters of several words such as NATO – are provided with an explanation. You recognize this by the dotted underline of the appropriate abbreviation and/or acronym. If you move the mouse across this abbreviation, then you will receive a tool-tip window with the explanation.

Usage and Properties of pop-up windows

As a rule, no opo-up windows will be opened. Pages linked will be opened in the window accessing it.

There ist one exceptions of it:

Targets of link lists will always be opened in a new pop-up window, so that the link list still remains accessible.

The pop-up windows can also be closed by the Esc key if Javascript is enabled.

Does Javascript or Java have to be absolutely enabled?

No. As said, maximum support becomes only possible by Javascript, however the contents are not affected by the deactivation (only the date of the last modification of the document is not shown any longer). Java scripts are not at all used on this site.

Usage of Cookies

At this website, no cookies are used.


There is no separate print version of the pages; this is not necessary, too.

There is a separate style sheet for the print version. Navigation elements will not be printed in the print version. The colored screen representation is replaced by a black-and-white representation.

Usage of XHTML

As a rule, these web pages were coded in accordance with the XHTML 1.0 standard. However, there is no change-over to you, since such XML and/or XHTML pages can be displayed by all browsers.

Usage of Style Sheets

The layout of this site is determined by shared style sheets (Cascading Style Sheets, CSS). The text remains completely readable any longer after disabling of the use of Cascading Style Sheets.

Usage of Unicode

The Unicode character set is used for coding almost all pages to clearly code all characters (letters and numbers) on this site. This character set is supported by all modern operating systems and by all browsers of the 4th generation.

The “Arial Unicode MS” character set used here is a component of the Microsoft ® Office-2000 and Office XP packages.

Usage of SVG

The SVG format is increasingly used for outline drawings and maps to achieve higher printing quality. First a GIF or a JPEG imaged is loaded to show a figure in any case. This figure will be replaced by an appropriate SVG image afterwards if the SVG plug-in is present.

The SVG plug-in can be downloaded at freely of charge.

Plug-Ins for Media Presentation

For the replay of special media (audio, video) a special plug-in is occasionally needed. This need is indicated at the appropriate places. All plug-ins used here can be downloaded freely of charge from the Internet (please note: the targets will be opened in a new browser window):

Search Tool

A Search Tool is available in the document header of each page. The search engine of Google is used fpr the search. Therefore you need an Internet access to use this service.