Can you fix my script problem?

Question

Hi everyone
I got this script:
function: gen specify color of text to pdf
everything was very well, unless final step, I want to the script keep the new file's name as same as my indesign file's name,
and no need to type in (".pdf")
Thank you all so much!
Harvey
//==============================================================
var doc = app.properties.activeDocument && app.activeDocument; 
if (!doc) {alert("Adiós Amigo") ; exit();} 
var sN = doc.swatches.everyItem ().name, 
    sID = doc.swatches.everyItem ().id, 
    /** UI */ 
    w = new Window ('palette', "Print by Color"), 
    g1 = w.add('group'), 
    g2 = w.add('group'), 
    st = g1.add('statictext', undefined, "Select Swatch from Drop Down List") 
    d = g1.add('dropdownlist', undefined, sN), 
    b1 = g2.add('button', undefined, "PDF"), 
    b2 = g2.add('button', undefined, "Print"); 
    b1.onClick = function () {proccessPages (d.selection, true)} 
    b2.onClick = function () {proccessPages (d.selection)} 
w.show(); 
function proccessPages (s, e) { 
    var l, c = 0, o, p, pO = {}, pA = []; 
    if (s == null) {alert("No Swatch Selected") ; return;}; 
    app.findTextPreferences = app.changeTextPreferences = null; 
    s = doc.swatches.itemByID (sID[s.index]); 
    app.findTextPreferences.fillColor = s; 
    var pageFinds = doc.findText (); 
    if (!(l = pageFinds.length)) {alert("No finds") ; return;}; 
    for (c = 0; c < l; c++) { 
        o = (p = pageFinds[c].parentTextFrames[0].properties.parentPage) && p.documentOffset + 1; 
        if (p) pO["_" + o] = o; // if the finds on a page add to page list 
    c = 0; 
    for (o in pO) pA[c++] = pO[o]; 
    var pageRange = "+" + pA.join(", +"); 
    doc.printPreferences.pageRange = pageRange; 
    if (!e) doc.print(true); 
    else { 
        app.pdfExportPreferences.pageRange = pageRange; 
        f = File.saveDialog("Export PDF", "PDF: *.PDF"); 
        if (!f) return; 
      app.activeDocument.exportFile (ExportFormat.PDF_TYPE, File(exportPath+'/'+linkname.name.replace(/(\.[^.]+)$/, '.pdf')), false, app.pdfExportPresets.item(exportPreset)); 
//==============================================================

Answer 1

everything was very well, unless final step...
app.activeDocument.exportFile (ExportFormat.PDF_TYPE, File(exportPath+'/'+linkname.name.replace(/(\.[^.]+)$/, '.pdf')), false, app.pdfExportPresets.item(exportPreset));
Hi Harvey,
Be honest, it can not work. There no exportPath, linkname and exportPreset in your code.
You pasted it from a several independent codes and ask for help to fix it ==> but, to tell you the true, is nothing to fix.
It reminds me very much one story happened to some guy somewhere:
He was asked by a stranger:
"Which way is shortest to another part of the city."
The guy knew the city pretty well but explaining the way took a minutes.
At the end, nonetheless, a stranger jumped to a guy's back and ask:
"Could you kindly take me there, pls?"
Jarek