<!DOCTYPE html>
<html>
<head>
<style>
table, th, td {
border: 1px solid black;
}
</style>
</head>
<body>
<h3>A demonstration of how to access a TR element</h3>
<table>
<tr id="myRow">
<td>First cell</td>
<td>Second cell</td>
<td>Third cell</td>
</tr>
</table>
<p>Click the button to delete the first cell from the table row.</p>
<button onclick="myFunction()">Try it</button>
<script>
function myFunction() {
var row = document.getElementById("myRow");
row.deleteCell(0);
}
</script>
</body>
</html>