Exclude the Roman Numerals Number Page Section

Hello!

In my Indesign document, normally my first pages are in Roman Numerals like you can see:

After I use the normal numbers like you can see:

Is there a script to know which number page start my normal number 1?

For example, if my document has the next pages:

I, II, III, IV, V, VI, VII, 1, 2, 3, 4, ...

this means my page 1 is in the number 8.

Here is the code but didn't works, because they find nothing in the number pages:

var doc = app.activeDocument;
// clear find change text preferences before search
app.findTextPreferences = app.changeTextPreferences = NothingEnum.NOTHING;
// this is scripting equivalent of the 'Find What:' edit text field
app.findTextPreferences.findWhat = "1";
// search it in the active document
// you can also search it in almost everywhere: story, text frame, paragraph, line, word, etc
var finds = doc.findText();
if (finds.length > 0) { // something has been found
// for the 1st found item display the name of the page where the 1st text frame (there can be several threaded frames) containing it is located
alert("Found " + finds.length + " items, the first of them is on page " + finds[0].parentTextFrames[0].parentPage.name);
}
else { // found nothing
alert("Nothing has been found");
}
// clear find change text preferences after search
app.findTextPreferences = app.changeTextPreferences = NothingEnum.NOTHING;

Maybe is helpful to know my number pages always have the style called Book Page Number  and is inside of my folder VARIOUS

I try also do this, but the script didn't find the number 1:

var myDoc = app.activeDocument,      
arrayRomanNumerals = ["1"],
I = arrayRomanNumerals.length,  i;      
app.findTextPreferences = null;    
for ( i = 0; i < I; i++) {         
    app.findTextPreferences.findWhat = arrayRomanNumerals;         
    myFound = myDoc.findText();      
    var J = myFound.length,  j; 
    var styleBookPageNumber = myDoc.paragraphStyleGroups.itemByName("VARIOUS").paragraphStyles.itemByName("Book Page Number");
    for ( j = 0; j < J; j++) {    
        myFound.appliedCharacterStyle = myDoc.characterStyles[0];    
        if (myFound.appliedParagraphStyle == styleBookPageNumber) {    
            alert("Found!"); } 
        else{break;}}}

Thanks so much.