string to array
HTML
<button class="test">
test
</button>
<table>
<tr>
<td class="par-1">test12</td>
</tr>
</table>
JavaScript
$( ".test" ).click(function() {
var numbersString = "field-1";
var numbersArray = numbersString.split('-');
var par = $(".par-"+numbersArray[1]).text();
/* $.each(numbersArray, function(index, value) {
//alert(index + ': ' + value);
}); */
alert(par);
});