Changing Variable values and saving it across sessions.

Question

Hi,
I've have an requirement like counting the number of times a form is opened and number of times a button is clicked.For this I tried to use global variables.I tried to increment the value of the variable each time a form is opened or a button is clicked.
opencount.value += 1;
But it didnt work for me.I tried to hardcode a value like
opencount.value = 5;
Even this is also not working.Do I need change any settings or extend rights.Is it possible to save the values that are persistent across the sessions.
Please help

Answer 1

I have another apporach using an extras object.
What you is a script object 'Actions' with this script, to create a counter in the extras object in any form object.
function initOpenCounter(targetObject) {
    if (targetObject.extras.nodes.namedItem("OpenCounter") === null) {
        targetObject.extras.nodes.append(xfa.form.createNode("extras", "OpenCounter"));
        targetObject.extras.OpenCounter.nodes.append(xfa.form.createNode("integer", "state"));
        while (targetObject.extras.OpenCounter.nodes.length > 0) {
            targetObject.extras.OpenCounter.nodes.remove(targetObject.extras.OpenCounter.nodes.item(t argetObject.extras.OpenCounter.nodes.length - 1));
        var newState = xfa.form.createNode("integer", "OpenCounter");
        newState.value = 0;
        targetObject.extras.OpenCounter.nodes.append(newState);
Then you need another script, to call the function in the script object and raise the counter, when the form opens.
I used a floating field in a text on a master pager and put this script into its initialize event.
Actions.initOpenCounter(this);
var cCount = parseInt(this.extras.OpenCounter.nodes.item(0).value, 10);
          cCount += 1;
this.extras.OpenCounter.nodes.item(0).value = cCount;
this.rawValue = cCount;
Here's a sample form with an open and save counter.
https://acrobat.com/#d=C90OHrJKx52LHrtbtahWzQ