optsar,
<!DOCTYPE HTML>
<html>
<head>
<title>Untitled</title>
<meta charset="utf-8">
</head>
<body>
<table >
<tr>
<td>0</td>
<td>Тип 0</td>
<td>Значение 0</td>
</tr>
<tr>
<td>1</td>
<td>Тип 1</td>
<td>Значение 1</td>
</tr>
</table>
<script>
var arr = [].map.call( document.querySelectorAll('tr'), function(tr) {
return {0 : tr.cells[1].innerHTML, 1 :tr.cells[2].innerHTML}
//return [tr.cells[1].innerHTML, tr.cells[2].innerHTML]
});
alert(JSON.stringify(arr))
</script>
</body>
</html>