コメント検索実装したいんですが直せる方居ますかね？たすけて

//Comment Regex Search (regex is not implemented yet)
//https://www.tam-tam.co.jp/tipsnote/javascript/post11315.html
document.getElementById("start_search").addEventListener("click", function() {
var commentDataArray = document.getElementsByClassName("___table-row___1-Ej1");
var commentData = [];
var commentList = document.getElementsByClassName("___table___3Fnci");
var k;
for(k = 0; k < 243; k = k + 1){
commentData[k]=[];
commentDataArray[k]=[];
commentList[0].setAttribute("data-offset", k);
for(var i = 0; i < commentDataArray.length; i++){
commentData[k][i] = commentDataArray[k][i].getAttribute("title");
console.log("commentData["+i+"]:"+commentData[i]);
}
}
var keywords = document.getElementById("comment_searchbox").value;
var searchResults = [];
var crsCon = document.getElementById("crs-container");
if (commentData.indexOf(keywords) != -1) {
searchResults.push(commentData);
}
for(k = 0; k < 243; k = k + 1){
searchResults[k]=[];
for (var j = 0; j < searchResults.length; j ++) {
crsCon.insertAdjacentHTML('beforeend', '<span>'+searchResults[k][j]+'<span>');
console.log("searchResults["+k+"]["+j+"]:"+searchResults[k][j]);
}
}
});