xul « variable « Javascript Data Type Q&A

1. In xul, how to retrieve an environment variable?    stackoverflow.com

I have an environment called $REP, how can I access the value of this variable using Xulrunner in a Linux environment? --udpate attempting with nslEnvironment:

var env = Components.classes["@mozilla.org/process/environment;1"].getService(Components.interfaces.nsIEnvironment);
dump("bash=" + env.exists("BASH") + ...

2. Pass variable values from child XUL window to parent XUL window using JavaScript    stackoverflow.com

I have a function to get the values of the selected check-box from the xul file(Lets say tree.xul). In another XUL file has the text-box where I want to pass the ...

3. Problem in passing the values stored in the single variable to child window in XUL using JavaScript    stackoverflow.com

This function is to get the values of selected tree rows:

function merge() {
    if (tree = document.getElementById('myTodoListTree'));
    for (var i = 0; i < tree.view.rowCount; ...

4. Listening for value change of a variable in firefox extension?    stackoverflow.com

Is there a way for listening for value change of a variable in javascript(Firefox extension)? [update] I am having an array I want to listen. Whenever something is pushed into that array, I ...

5. Javascript variable used in firefox extension    stackoverflow.com

I have: I would like to learn about Firefox extensions, so I downloaded the zip file containing the "Hello World" example from http://kb.mozillazine.org/Getting_started_with_extension_development. In hello.xul I have:

<hbox align="center">
<description flex="1">text in ...