Export to PDF with MetaData

I have a script that exports each individual page to a pdf with each page having it's own metadata.

It works fine except for on small thing.

The keyword array looks like this in the final PDF.

; "Keyword1, Keyword2, Keyword3

"

How do I get rid of the semicolon and quotes?

Thanks!

main ();

function main() {
var curDoc = app.activeDocument;
var docPath = app.activeDocument.filePath;  

// Array of paragraph Style names 
var paraStyleNames = ["meta-title", "meta-alt", "meta-subject"]; // insert here your para names !
var missingParaStyles = [];
// check, if the styles are valid 
for ( var p = 0; p < paraStyleNames.length; p++ ) { 
    var curName = paraStyleNames
; 
    // if the style is missing, push it to the array
    if ( !curDoc.paragraphStyles.itemByName(curName).isValid ) {
        missingParaStyles.push( curName );
    } 
}

var folderPath = new Folder(docPath + "/" + curDoc.name.replace(/\.indd$/,"") + "-pdf");
    if (!folderPath.exists)
        folderPath.create();
      
// loop through all pages
for ( var i = 0; i < curDoc.pages.length; i++ ) {
    // the current page
    var curPage = curDoc.pages;


// Page number
    var pName = (curPage.name < 10) ? ("0" + curPage.name) : curPage.name;
    
   // controls the loop
    var controller = true;

  // all paragraphs on the current page
    var allPageParas = curPage.textFrames.everyItem().paragraphs.everyItem().getElements();
    // loop through all paragraphs and check, if one has the para style applied
    for ( var p = 0; p < allPageParas.length; p++ ) {
        if ( !controller ) break;
        // the current para
        var curPara = allPageParas
;
        // loop through the styles
        for ( var n = 0; n < paraStyleNames.length; n++ ) {
            if ( curPara.appliedParagraphStyle.name == "meta-title" ) {
                var docTitle = curPara.contents;
               } // end if
            if ( curPara.appliedParagraphStyle.name == "meta-alt" ) {
                var docAlt = curPara.contents;
            } // end if
         if ( curPara.appliedParagraphStyle.name == "meta-subject" ) {
                var docKeywords = curPara.contents;
                var docDirectory = Array(docKeywords);  
            } // end if
        } // end for paraStyleNames
    } // end for allPageParas

for (var i = 0; i < docDirectory.length; i++) {
    docDirectory = docDirectory.replace(/; /g, "");
}

    var filePath = folderPath + "/" + curDoc.name.replace(/\.indd$/,"")  + "-" + pName + ".pdf";
    var myFile = File( filePath );
    var pdfPreset = "Labels"; 
    
    with (curDoc.metadataPreferences){
    documentTitle = docTitle;
    author = curDoc.name.replace(/\.indd$/,"") ;
    description = docAlt;
    contentCreator = curDoc.name.replace(/\.indd$/,"")  + "-" + pName ;
    keywords =  docDirectory;
    }

with (app.pdfExportPreferences) {
  pageRange = curPage.name;  
  viewPDF = false }


  curDoc.exportFile( ExportFormat.PDF_TYPE, myFile, false, pdfPreset );
    }
  } // end for > main