<!DOCTYPE html>
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<script>
$(document).ready(function(){
$("tr:even").css("background-color", "Red");
});
</script>
</head>
<body>
<h1>Welcome to My Web Page</h1>
<table border="1">
<tr>
<th>Company</th>
<th>Emp. Count</th>
</tr>
<tr>
<td>Company 1</td>
<td>1000</td>
</tr>
<tr>
<td>Company 2</td>
<td>30000</td>
</tr>
<tr>
<td>Company 3</td>
<td>30000</td>
</tr>
<tr>
<td>Company 4</td>
<td>40000</td>
</tr>
<tr>
<td>Company 4</td>
<td>400320</td>
</tr>
</table>
</body>
</html>Check below jQuery code use to Headlight
$(document).ready(function(){
$("tr:even").css("background-color", "Red");
});