I'm looking for a simple way to pass a ( one, 1) parameter from the url to the index.html to the param value for the applet.

The second part of this works fine as described here http://www.processing.org/reference/param_.html .

The parameter (below: "51") needs to be hardcoded into the index.tml file as follows:
// <applet code="param_" archive="param_.jar" width=100 height=100>
// <param name="back" VALUE="51">  
// </applet>

What I want is to read the parameter from the url. Using javascript, this works fine as follows:
is this is the url: http://fileorserverpath/mysketch/applet/index.html#51
then this script will give me the "51" :

<script type="text/javascript">
url_param = decodeURI(window.location.hash.substr(1));
</script>

which can be tested by e.g. entering
alert(url_param);
before </script>.

However, and that's my question:
I was not able to pass this parameter (url_param) which has the content "51" to the VALUE needed for the applet.

I searched through the processing alpha and beta boards, went to sun and netscape documentation, but I assume that I am just not expert enough when it comes to advanced code writing.

I would prefer not to change anything in the processing code, but to handle everything in the index.html file.

Any recommenations? And: simple, please, I am not a expert code writer ( think I mentioned that before, and which is why I like processing.org)

Thanks.

To clarify the need:

I don't want to CHANGE them (during runtime), I only want to set them once before the applet is even started. And then it would be fine for me.
So it would be fine if it's only valid once for the time when the page load.
1. Browser calls the http://../index.html#51
2. When the browser interprets the file, if finds the javascript which pulls the "51" from the url.
3. AND THAT's MISSING: this value is then passed to the VALUE which is a parameter for the java applet.
4. The java applett is called, including the parameter, started, and it runs.
5. needs to run only once, fine with me.

So it would be only step 3 above that I need clarification about. Is it REALLY not possible?

Christian

hi christian,

do you know that you can call methods in javascript from the applet? So it would be possible to set variables in the applet directly, instead of using html-param values.

If you got an applet called Processing in the applet-element, you can reference it in javascript like:


html:
Code:

<APPLET CODE="Processing.class" NAME="Processing" WIDTH=150 HEIGHT=25></APPLET> 

javascript:
Code:

document.Processing 

if you got a variable "value" in your processing-code (maybe you have to declare it public), you can set this in javascript:

Code:

document.Processing.value = 51;
 

This is just a quick summary of what I found here:

http://wp.netscape.com/eng/mozilla/3.0/handbook/javascript/

Look into Chapter 4 if you wanna know more.

Maybe this will help you.