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Pass vbscript variables to a JavaScript string

I have a vbscript that I use in Illustrator. In order to save my file as a TIFF I need to use JavaScript. With complete paths the JS script section works fine but when I try to change them to variables('NewState" and 'NewSection' via user input), it's a no go. Nubie to JS so how to insert those variables?
Here's is my latest attempt (FYI - in Illustrator, to use JS inside VBS one must execute it as a String as shown below).
Set App = CreateObject("Illustrator.Application")
Set FSO = CreateObject("Scripting.FileSystemObject")
Dim SourceFolder, DestFolder, NewState, NewSection
Call GetNewInputs()
Sub GetNewInputs()
NewState = UCase(InputBox("Current STATE or REGION to be processed.", _
"STATE or REGION", "SOCAL"))
NewSection = ("Section_" & InputBox("INPUT SECTION NUMBER: Section_YY", _
"Input Section", "32"))
Set SourceFolder = FSO.GetFolder("S:\" & NewState & "\" & NewSection & "\Road DXFs")
DestFolder = "S:\" & NewState & "\" & NewSection & "\Light TIFFs\"
End Sub
App.DoJavaScript("function test(){var doc = app.activeDocument;var destFile = new File(""/s/" + <%=NewState%> + "/" + <%=NewSection%> + "/Light TIFFs/SOCAL_CN68_resx.tif"");var type = ExportType.TIFF;var opts = new ExportOptionsTIFF();opts.imageColorSpace=ImageColorSpace.GrayScale;opts.resolution=72;opts.antiAliasing=AntiAliasingMethod.ARTOPTIMIZED;opts.IZWCompression=false;opts.saveMultipleArtboards=true;opts.artboardRange=""1"";doc.exportFile(destFile, type, opts);}test();")
MyDoc.Close(2)

How to extract a specific text from a string. The hard part is the desired text changes periodically

I have an HTML document which contains this text somewhere in it
function deleteFolder() {
var mailbox = "CN=John Urban,OU=Sect-1,DC=TestServer ,DC=acme,DC=com";
var path = "/Inbox/";
//string of interest: "CN=John Urban,OU=Sect-1,DC=TestServer ,DC=acme,DC=com"
I just want to extract this text and store it in a variable in C#. My problem is that string of interest will slightly change each time the page is loaded, something like this:
"CN=John Urban,OU=Sect-1,DC=TestServer ,DC=acme,DC=com"
"CN=Jane Doe,OU=Sect-1,DC=TestServer ,DC=acme,DC=com"
etc....
How do I extract that ever changing string, without regular expression?

Is it always a function deleteFolder() which has its first line as var mailbox = "somestring"? And you are interested in somestring?
Based on the requirements you told us, could just search your string containing the HTML for var mailbox =" and then the next " and take all text between these two occurrences.
var htmlstring= "..."; //
var i1 = htmlstring.IndexOf("var mailbox = \"");
var i2 = i1 >= 0 ? htmlstring.IndexOf("\"", i1+15) : -1;
var result = i2 >= 0 ? htmlstring.Substring(i1+15, i2-(i1+15)): "not found";
VERY, VERY ugly, not maintainable, but without more information, I can't do any better. However Regex would be much nicer!

From .txt data give values to inputs

I'm trying to fill some inputs when you load a page, using the data I have from a .txt file. This file has a list of numbers
1
2
3
Something like this. So I wanted to read this lines and put them in their corresponding input. Suggestions on how to do this??
I tried with this code, but maybe I have a mistake that I don't know about, I'm starting with javascript.
function loadvalues()
{
var fso = new ActiveXObject("Scripting.FileSystemObject");
var s = fso.OpenTextFile("E://Steelplanner/Demand_Routing/Pruebas/OrderBalancing_Masivos/ModificaFechaTope/DueDate/Datosactuales.txt", true);
var Ia5 = document.getElementById("Ia5sem");
var text = s.ReadLine();
Ia5.value = text;

Try using file.ReadLine() until document not completely read using while loop with AtEndOfStream of file variable.
Here is example you can refer: ReadLine Method
Don't forget to replace TextFile path to your own text file path
My text file contains same data as in your example
<script type="text/javascript">
var fso = new ActiveXObject("Scripting.FileSystemObject");
//specify the local path to Open and always add escape character else throw error for bad file name
var file = fso.OpenTextFile("C:\\Users\\MY_USER\\Desktop\\txtfile.txt", 1);
var Ia5 = document.getElementById("Ia5sem");
while (!file.AtEndOfStream) {
var r = file.ReadLine();
Ia5.innerHTML = Ia5.innerHTML + ("<br />" + r);
}
file.Close();
</script>
<p id="Ia5sem">HI</p>

So, I don't know why, but I just changed the name of the variables and made a slight change in the .OpenTextFile line and it worked.
function loadvalues()
{
var file = new ActiveXObject("Scripting.FileSystemObject");
var text = file.OpenTextFile("E:\\Steelplanner\\Demand_Routing\\Pruebas\\OrderBalancing_Masivos\\ModificaFechaTope\\DueDate\\Datosactuales.txt", 1,false);
var Ia5s = document.getElementById("Ia5sem");
Ia5s.value = text.ReadLine();
var Ia4s = document.getElementById("Ia4sem");
Ia4s.value = text.ReadLine();
text.close();
}
Anyways, I'm gonna check the FileReader() for future references and the script #Sarjan gave, maybe I can improve it, but I have other things to finish. Thanks for everything.

Finding the difference between two fields using JavaScript in iText

I would like to find difference between two fields using JavaScript in iText.
I am able to find the sum of them using below code:
PdfStamper stamperResult = new PdfStamper(readersectionResult, new FileOutputStream(RESULT_NEW));
stamperResult .addJavaScript("var nameField = this.getField(\"total\");"+ "nameField.setAction(\"Calculate\",'AFSimple_Calculate(\"SUM\",\"total1\", \"total2\")')");
Is there any way to find the difference using 'AFSimple_Calculate' similar to what I did in the above code snippet?
Thanks for editing! I tried your suggestion but it does not seem to work for some reason.
stamperResult.addJavaScript(" var total1 = this.getField(\"value1\"); var total2 = this.getField (\"value2\"); var subtr = this.getField(\"total\"); subtr.value = total1.value - total2.value;");
I separated newlines by spaces and added right escape characters.
I was also thinking of using a different logic for subtraction using AF methods : like this
stamperResult.addJavaScript("var nameField = this.getField(\"total\");"+ "nameField.setAction(\"Calculate\",'AFSimple_Calculate(\"SUM\",\"total1\", \"-total2\")')");
In the above code I was trying to add -(negative value) to total 2 so that it will be subtracted from total1 though the AF method is still 'SUM'.
But that does not work.
The below simple code seem to work :
stamperResult.addJavaScript("var nameField = this.getField('total');" +
"nameField.setAction('Calculate'," +
"'subtract()');" +
"" +"function subtract(){this.getField('total').value
= (this.getField('total_1').value -this.getField('total_2').value); }");

I updated your question because it contained many spelling errors. I didn't edit the code snippet because I don't know what the original code snippet is like. In any case: I think something went wrong during the copy/paste process, as I don't think your code snippet compiles in its current state.
In any case: as far as I know the AF-methods (the AF stands for Adobe Forms) may not be present in every viewer, and as far as I know Adobe didn't implement a way to subtract values from each other in the AFSimple_Calculate method.
For these two reasons, you may prefer regular JavaScript instead of using a pre-canned function that may or may not be pre-canned.
This regular JavaScript may look like this:
var total1 = this.getField("total1");
var total2 = this.getField("total2");
var subtr = this.getField("difference");
subtr.value = total1.value - total2.value;
I'm not sure if that answers your question. Maybe you just want:
var total1 = this.getField("total1");
var total2 = this.getField("total2");
var namefield = total1.value - total2.value;
You can put these lines inside a String using the right escape characters and replacing the newlines by spaces or newline characters.
Of course, you need to trigger this code somewhere. Below you'll find an example that puts the negative value of the content of a value1 field into a value2 field.
public static void main(String[] args) throws IOException, DocumentException {
Document document = new Document();
PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("js.pdf"));
document.open();
writer.addJavaScript("function makeNegative() { this.getField('value2').value = -(this.getField('value1').value); } ");
Rectangle rect1 = new Rectangle(40, 740, 200, 756);
TextField value = new TextField(writer, rect1, "value1");
value.setBorderColor(GrayColor.GRAYBLACK);
value.setBorderWidth(0.5f);
PdfFormField field = value.getTextField();
field.setAdditionalActions(PdfName.BL, PdfAction.javaScript("makeNegative();", writer));
writer.addAnnotation(field);
Rectangle rect2 = new Rectangle(40, 710, 200, 726);
TextField neg = new TextField(writer, rect2, "value2");
neg.setBorderColor(GrayColor.GRAYBLACK);
neg.setBorderWidth(0.5f);
writer.addAnnotation(neg.getTextField());
document.close();
}
Note that I used a Blur action. This means the method will be triggered as soon as you select another field after filling out the value1 field.

Variable Returning NaN Value - Cannot find out why

I am having to pickup from where someone in the business left off many years ago with an aging texting system.
It was built using ASP classic and sends a string to an API that then texts out, all this is neither here nor there. The problem i have is no JS experience, I am am a SQL Developer and did a little bit of ASP Classic (VBScript) years ago.
This piece of JScript picks up information from several form boxes and then places them in a string which is then passed to variable on a processing page to text out. The fields 'QValue, Indemnity and Excess' are all numeric. The Cover is text and it is replacing the cover text with 'NaN' now I understand this is for 'Not A Number' well that is exactly what it is, not a number but I want the text string.
Here is the snippet of code in question:
<script type="text/javascript">
function changeMessageText()
{
var messagetxt = document.getElementById('message').value
var QValue = document.getElementById('QValue').value
var Cover = document.getElementById('Cover').value
var Excess = document.getElementById('Excess').value
var Indem = document.getElementById('Indemnity').value
var messagetxt=messagetxt.replace("[QValue]", + QValue)
var messagetxt=messagetxt.replace("[Cover]", + Cover2)
var messagetxt=messagetxt.replace("[Excess]", + Excess)
var messagetxt=messagetxt.replace("[Indem]", + Indem)
document.getElementById('messageText').innerHTML = messagetxt;
}
</script>
Cheers.

When you do string.replace(searchvalue,newvalue), there is no need of + before the newValue
var messagetxt=messagetxt.replace("[QValue]", QValue)
//cover or cover2 whichever appropriate
var messagetxt=messagetxt.replace("[Cover]", Cover)
var messagetxt=messagetxt.replace("[Excess]", Excess)
var messagetxt=messagetxt.replace("[Indem]", Indem)

Is it normal that you use Cover2 in the replace where you read the input value and store it in the Cover variable ?
Those are two different variables and from the code you provided, we can only assume that Cover2 is initialized with NaN (which might not be the case, it can be copy/paste error).

Here is how you do it:
var messagetxt = document.getElementById('message').value;
var QValue = document.getElementById('QValue').value
var Cover = document.getElementById('Cover').value
var messagetxt=messagetxt.replace("[QValue]", QValue)
var messagetxt=messagetxt.replace("[Cover]", Cover)
document.getElementById('messagetxt').innerHTML = messagetxt;
Here is a working example of this: http://jsfiddle.net/F24cr/
Enjoy