Interactive errors are caused by applications or scripts (CGI, Java etc.) that do not perform the expected action upon execution. Try to use technology that will work on most platforms and browsers. Some examples:

• You use a CGI script to process your e-mail form, and upon execution an error code appears or nothing happens. (Page not found error, script not configured properly etc).
• Another example is when you use a java script as a slideshow feature, but the only thing we see is a gray box.