Applet reload problem

Question

How can one ensure that an applet re-initialise itself when returning to the applet's page after leaving to other pages.
I can only force to reload by pressing ctrl and refresh botton on the browser. Is there any tricks that can bypass this procedure and reload the applet automatically when one re-enter the applet's page?
Thanks for any great suggestion.

Answer 1

I think that JavaScript can be very useful if you wish to establish communication between your Applet and your browser.
JavaScript -- > Java communication does not require the use of any particular API
You just neet to clearly specify the name of your applet like this :
(I prefer to use OBJECT tag than APPLET... is more generic)
<OBJECT classid="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93" name="myApplet" width="230" height="360" align="baseline">
<PARAM name="code" value="myApplet.class">
<PARAM name="type" value="application/x-java-applet">
<PARAM name="scriptable" value="true">
</OBJECT>Check out the scriptable parameter. This is required for Java --> JavaScript communication.
Now, let's say you want a call a method called setMyAppletName that you have implemented in your applet, you would call it from a JavaScript function like this :
function callJavaMethod(){
document.myApplet.setMyAppletName("myApplet");
}Notice that parameter name in your tag insertion tags should match the name of the applet you're tring to acces in the JavaScript function.
Java -- > JavaScript communication it's a bit more complicated. It requires the use of netscape libraries that you can find in the following path of your Netscape install :
[your Program Files directory ]\Netscape\Communicator\Program\java\classes
There you will need a jar file called java40.jar (this is what I have with Netscape 4.7) where netscape packages are found. After having isntalled this jar in my package directory, this is how I refer to API
import netscape.javascript.*;
//Reference to browser window where current applet is embedded
JSObject jsoWindow = JSObject.getWindow(this);
//Preparing parameters to be sent to a JavaScript function that is going to be called
String strHelloMsg = "Hello";
//Parameters neet to be stored in a String array in order to be passed to JavaScript function
String[] strArrParams = {strHelloMsg };
//Init JavaScript function name to be called
String strFunctionName = "showMessage"
//Call JavaScript function
_jsoWindow.call(strFunctionName, strArrParams);In your HTML page you could define such function like this :
<script>
    function showMessage(strMsg){
            alert(strMsg);      
</script>That's all the help I can give since I don't know how JavaScript browser events work. You should find it out in the huge amounts of JavaScript tutorial and reference sites.
Good luck !
Diego