Experiencing technical problems with the online learning program?
Consider some of the troubleshooting pointers listed on this page. Also,
from this page you can access a linked outline of the entire learning
Web site pages won't load properly
Minimum technical requirements for using this Web site call for a personal
computer with at least a 200-MHz processor and 32 Mb of installed RAM
(such as a Pentium-class computer). Another technical requirement is that
you have what is now considered a standard modem (56kps) or faster connection
to the Internet. If your home computer does not meet these technical requirements,
your local library may have publically available computer equipment that
Also, interactions in this learning program require that you access
the Web site with a version 4 or higher Web browser (such as Netscape
4.08 or Microsoft Internet Explorer 4.0. Note: Proper operation of drag-and-drop activities requires Internet Explorer 4.0 or higher or Netscape 8.0 or higher.
There are so many navigation buttonswhere do
There are essentially two navigation schemes on this Web site. The buttons
on the left-hand side of the screen are for navigating your way around
the main pages of this site and the sequence of screens in the online
Note that in the learning program, the left-hand navigation is specific
to the different sections of the program, and navigation for the main
pages of the site appears in the upper right (below the Web site's header).
This navigation element is bound by two gray arrows for moving to the
next or previous screen. Navigation for moving to the next or previous
screen also is provided at the bottom of each screen of the online learning
The four buttons at the very top right of each page are not for navigating
this specific Web site. Because this Web site was developed and is maintained
by ATSDR, an agency of the U.S. Department of Health and Human Services
(HHS), links in the top portion of the site's header (also called a banner)
are related to ATSDR's main Web site. For example, the Home link in the
header takes you to the ATSDR Home page. Both of the logos in the header
are also links, to ATSDR and HHS. Additionally, a variety of ATSDR-related
links are included in the footer of each page.
Exercises that involve dragging text across the screen
Interactions in this learning program require that you access the Web
site with a version 4 or higher Web browser (such as Netscape 4.08 or
Microsoft Internet Explorer 4.0). Also, drag-and-drop activities included
on some screens requires Internet Explorer 4.0 or higher or Netscape 8.0 or higher. As
an alternative to using the onscreen interactions to access information,
text-only versions of individual screens are available throughout the
learning program from links at the bottom of the page.
Pop-up windows won't launch when I click on an icon
A new pop-up window won't launch if one is already open. Therefore, you
must always close a pop-up window after you have finished reading or reviewing
its contents. You can close a pop-up window either by clicking on the
Close Window button at the bottom of the window or by clicking on the
X in the upper-righthand corner of the window. If using Windows, be sure
to check your taskbar for pop-up windows that are still open but have
Page won't print
If you are having difficulty printing a page from the online learning
program using your browser's print function, print from the print-friendly
version of the page. A link to a print-friendly version is located at
the bottom of each page. If you are using a Netscape browser, text on
some screens cannot be printed except from the print-friendly version
of the page.
Files marked PDF won't open
If you click on an icon with a notation for a PDF, a Portable Document
Format file should automatically open. (The PDF notation also specifies
the size of the file.) To open a PDF file, you need to have the free Adobe
PDF reader installed on your workstation. If you do not have this free
software, you can download if from the Adobe site provided below. Also,
even if you have the reader installed, you may want to update it with
the current version: http://www.adobe.com/products/acrobat/readstep.html
If you have the current version of Adobe Acrobat Reader installed and still have trouble, you may have to disable your browser's pop-up blocker to view PDF files.
Hyperlinked text jumps me to another pagehow
do I get back?
Some screens in the learning program include links to other sections of
the program. If you click on one of these links, you can return to the
page you started from using the Back button in your browser toolbar.
Some links on this Web site will jump you to an entirely different site
on the Web. If clicking on a link will jump you to a location beyond the
domain of this Web site and ATSDR, the link is flagged with an "Exit"
icon. Again, you can return to the originating page using the browser