Applet Not Working?
If you are using Microsoft Windows and a Security Warning box pops up saying that the application has been blocked from running because it is "untrusted" please click here. If you get similar messages with Linux, please click here.
Can't Enter Keywords
You're probably using the Opera Browser. Click in the middle of the applet. Then click in the narrow space between the applet and the links just below it. Then click in the text field. You should be able to enter keywords now. This is an inexplicable anomoly of the Opera Browser. Also with Opera it is necessary to click the first button you click twice in order for it to work.
Applet Doesn't Start
Browsers are updated from time to time. Sometimes an update can carry a serious bug that was not there before. An example is the Firefox browser cira April 2012. When you press the View Document button Firefox takes about 3 to 5 minutes to get around to loading the document. The remedy is to use another browser, the least problematic and most stable of which I have found to be SeaMonkey.
Applet Is Blank
All you get is a blank grey rectangle marking the area of the applet's window, but nothing else appears?
Check the Java Console of your browser to see what kind of Java "Exception" has occurred. Perhaps you simply need to update your version of the Java Runtime Environment (JRE) to at least the version with which I last compiled the applet.
The "security" functions in some of the latest browsers can be problematic. On some settings, the browser does not permit applets to run at all. Other settings permit only so-called "certified" applets to run. That is, applets whose authors have registered the applet with some "authority" or other and acquired a digital certificate for the applet. I can't afford the cost of registration. Some browsers give you the option of allowing applets from a particular web site to run in your browser. Try to find how to configure your browser to allow applets from my website to run within your browser.
Applet Displays A Red Error Message
A text field and various buttons appear on the applet but you also see a very technical-looking red error message near the bottom of the applet area.
This probably means that your browser is allowing the applet to run but is denying it permission to download its own index from my server. Again, it is a problem with security settings. Somewhere in your browser's configuration (or settings) menu there should be an option for allowing an applet to download data either generally, or from specific named web sites.
This overly-tight security is only necessary with commercial web sites because some of them try to download programs to run native within your computer. My web site is completely non-commercial. Consequently, I have no motive to want to load programs into your computer. Besides, I don't think this is possible with Java. As I am led to believe, this is only possible with something called ActiveX, about which I know nothing.