nyshka,
<!DOCTYPE HTML>
<html>
<head>
<title>Untitled</title>
<meta charset="utf-8">
<style type="text/css">
td {
width: 50px;
height: 50px
}
</style>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
<script>
$(function(){
var tr = $("tbody tr");
tr.each(function(indx, el){
var i = indx % 2;
$("td", el).filter( [":even",":odd"][i] ).css({"backgroundColor" : "rgb(0, 0, 255)"})
});
});
</script>
</head>
<body>
<table width="400" summary="" >
<thead>
<tr>
<th>Title 1</th>
<th>Title 2</th>
<th>Title 3</th>
</tr>
</thead>
<tbody>
<tr>
<td>Cell 1.1</td>
<td>Cell 1.2</td>
<td>Cell 1.3</td>
</tr>
<tr>
<td>Cell 2.1</td>
<td>Cell 2.2</td>
<td>Cell 2.3</td>
</tr>
<tr>
<td>Cell 3.1</td>
<td>Cell 3.2</td>
<td>Cell 3.3</td>
</tr>
<tr>
<td>Cell 4.1</td>
<td>Cell 4.2</td>
<td>Cell 4.3</td>
</tr>
</tbody>
</table>
</body>
</html>