How to apply hypertext marker to text with specific character tag

I am trying to apply a gotolink marker in my text to a word that has a specific character tag. A couple of months ago, frameexpert helped me with some code that applies the newlink marker to text in a specific paragraph format, and I thought I could just modify it (see below). But I'm obviously missing something because it just won't work. The marker needs to be added to the specific words, so that they are a link, rather than to the beginning of the paragraph, so I know I need to do something about the offset location. But first, I just need it to work. Any help would be much appreciated! Thanks in advance.

#target framemaker

main ();

function main () {

    var doc = app.ActiveDoc;

    if (doc.ObjectValid () === 1) {

            processDoc (doc);

    }

    else {

         alert ("There is no active document.");

    }

}

function processDoc (doc) {

    var findLink = doc.GetNamedCharFmt ("Link");   // Match Link character format.

    var pgf = doc.FirstPgfInDoc;

    while (pgf.ObjectValid () === 1 ) {

        if (findLink.ObjectValid (doc) === true) {

            processGoToLink (pgf, doc);

        }

        pgf = pgf.NextPgfInDoc;

     }

}

function processGoToLink (pgf, doc) {   

    var num = getFigOrTableNum (pgf);  // Calls the function to get the figure or table numbers

    if (num) {

       var marker = getMarker (doc, "Hypertext", "gotolink");    // See if a gotolink marker already exists in the paragraph.

       if (marker) {

            // Update the existing marker's text.

            marker.MarkerText = "gotolink " + num;

        }

        else {  // No existing marker; create a new one.

            createMarker (doc, 0, "Hypertext", "gotolink " + num);  // I don't want the marker at the beginning of the paragraph. The combination of letter plus number (F1) should be the link.

        }

    }

    else {

        Console ("Couldn't find number: " + pgf.Name);

    }

}

function getMarker (pgf, markerType, text) {  // See if a marker exists in a paragraph 

    var markers = [], marker, textList, i;

    textList = pgf.GetText (Constants.FTI_MarkerAnchor);

    for (i = 0; i < textList.len; i += 1) {

        marker = textList.obj;

        if (marker.MarkerTypeId.Name === markerType) {

            if (marker.MarkerText.indexOf (text) > -1) {

                return marker;

            }

        }

    }

}

// Create a new marker

function createMarker(doc, pgf, offset, type, text) {

    var tLoc = new TextLoc(pgf, offset);

    var marker = doc.NewAnchoredObject(Constants.FO_Marker, tLoc);

    var markerType = doc.GetNamedObject(Constants.FO_MarkerType, type);

    marker.MarkerTypeId = markerType;

    marker.MarkerText = text;

    return 1;

}

function getFigOrTableNum (pgf) {  

    var doc = app.ActiveDoc;

    var regex = /((AF|AT|[FT])(\d+))/;  // Match F or T or AF or AT plus number in text

    var pgfText = getText (pgf, doc);  // Calls next function to get the text

    if (regex.test (pgfText) === true) {

        var match = pgfText.match (regex);

        return (match[1].toLowerCase ());

    }      

}

function getText (textObj, doc) {      // Gets the text from the text object.

    var text = "", textItems, i;

    if (textObj.constructor.name !== "TextRange") {     // Get a list of the strings in the text object or text range.

        textItems = textObj.GetText(Constants.FTI_String);

    } else {

         textItems = doc.GetTextForRange(textObj, Constants.FTI_String);

     }

    // Concatenate the strings.

    for (i = 0; i < textItems.len; i += 1) {

        text += (textItems.sdata);

    }

    return text; // Return the text

    }