console
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>sample</title>
<style>
table {
border-collapse: collapse;
}
td {
border: 1px solid black;
padding: 3px 5px;
}
</style>
</head>
<body>
<table>
<tr>
<td>1:1</td>
<td>2:1</td>
<td>3:1</td>
<td>4:1</td>
<td>5:1</td>
</tr>
<tr>
<td>1:2</td>
<td>2:2</td>
<td>3:2</td>
<td>4:2</td>
<td>5:2</td>
</tr>
<tr>
<td>1:3</td>
<td>2:3</td>
<td>3:3</td>
<td>4:3</td>
<td>5:3</td>
</tr>
<tr>
<td>1:4</td>
<td>2:4</td>
<td>3:4</td>
<td>4:4</td>
<td>5:4</td>
</tr>
<tr>
<td>1:5</td>
<td>2:5</td>
<td>3:5</td>
<td>4:5</td>
<td>5:5</td>
</tr>
</table>
<script>
for(let i of ) {
alert(table.rows[0].cells[1]);
}
</script>
</body>
</html>