问在div中的特定点追加字符串

EN

var words = ['dog', 'mouse', 'horse', 'fossil', 'christmas', 'mountain', 'javascript', 'glitter', 'pringles', 'connect'];
var output = "";
var gRand = "";
var gWordAry = "";
function startGame() {
    var rand = words[Math.floor(Math.random() * words.length)]; //gets a random word from the array, stores as rand
    var wordAry = rand.split(''); //splits random word into its own array and each letter is in the array
    gRand = rand; //stores random word as global var
    gWordAry = wordAry;
    alert(wordAry);
    $('#hangmanGame').show();
    $('#startBtn').hide();
    //alert(rand);
    for (i = 0; i < wordAry.length; i++) { //draws a dash for every letter in the random word array after split
        //draw canvas dash
        output += ' _ ';
        $('#wordGuess').html(output);
    }


    //alert(output);


}

function guess(letter) {
    var letterID = letter.toLowerCase(); //converts letter to lowercase from html
    //alert(letterID);
    var foundLetter = 0;
    for (i=0;i<gWordAry.length; i++){
        if (gWordAry[i] == letterID){ //if a letter in the word array = the letter clicked this will run
            //alert('correct');
            foundLetter++;
            displayLetter(letterID);
        }
    }
    if (foundLetter == 0){ //if no letters in the array are found this will run
        alert('Try Again');
    }

}

function displayLetter(letterID){
    //displays all letters in the word
    $('#wordGuess').append(letterID)
}

<div id="hangmanGame">
    <div id="wordGuess">  </div>  //THIS IS THE DIV WHERE THE LETTERS ARE GOING
    <table style="margin: auto;position: relative;top: 500px;">
        <tr> 
            <td><button class="alphabet" type="button"> </button></td>
            <td> <button type="button" onclick="guess('A')" id="1" class="alphabet">A </button></td> 
            <td> <button type="button" onclick="guess('B')" id="2" class="alphabet">B </button></td>
            <td> <button type="button" onclick="guess('C')" id="3" class="alphabet">C </button></td>
            <td> <button type="button" onclick="guess('D')" id="4" class="alphabet">D </button></td>
            <td> <button type="button" onclick="guess('E')" id="5" class="alphabet">E </button></td>
            <td> <button type="button" onclick="guess('F')" id="6" class="alphabet">F </button></td>
            <td> <button type="button" onclick="guess('G')" id="7" class="alphabet">G </button></td>
            <td> <button type="button" onclick="guess('H')" id="8" class="alphabet">H </button></td>
            <td> <button class="alphabet" type="button"> </button></td></tr>
        <tr> 
            <td> <button class="alphabet" type="button"> </button></td>
            <td> <button type="button" onclick="guess('I')" id="9" class="alphabet">I </button></td>
            <td> <button type="button" onclick="guess('J')" id="10" class="alphabet">J </button></td>
            <td> <button type="button" onclick="guess('K')" id="11" class="alphabet">K </button></td>
            <td> <button type="button" onclick="guess('L')" id="12" class="alphabet">L </button></td>
            <td> <button type="button" onclick="guess('M')" id="13" class="alphabet">M </button></td>
            <td> <button type="button" onclick="guess('N')" id="14" class="alphabet">N </button></td>
            <td> <button type="button" onclick="guess('O')" id="15" class="alphabet">O </button></td>
            <td> <button type="button" onclick="guess('P')" id="16" class="alphabet">P </button></td>
            <td><button class="alphabet" type="button"> </button></td></tr>
        <tr> <td> <button type="button" onclick="guess('Q')" id="17" class="alphabet">Q </button></td>
            <td> <button type="button" onclick="guess('R')" id="18" class="alphabet">R </button></td>
            <td> <button type="button" onclick="guess('S')" id="19" class="alphabet">S </button></td>
            <td> <button type="button" onclick="guess('T')" id="20" class="alphabet">T </button></td>
            <td> <button type="button" onclick="guess('U')" id="21" class="alphabet">U </button></td>
            <td> <button type="button" onclick="guess('V')" id="22" class="alphabet">V </button></td>
            <td> <button type="button" onclick="guess('W')" id="23" class="alphabet">W </button></td>
            <td> <button type="button" onclick="guess('X')" id="24" class="alphabet">X </button></td>
            <td> <button type="button" onclick="guess('Y')" id="25" class="alphabet">Y </button></td>
            <td> <button type="button" onclick="guess('Z')" id="26" class="alphabet">Z </button></td> </tr>
    </table>
</div>