Getting a parent element for a jquery selector

Answer 1

you can use this.

$('.anotherclass').click(function () {
     alert($(this).parents('tr').attr("id"));
});

Answer 2

Use closest:

$(".anotherclass").click(function() {
    console.log($(this).closest("tr").attr("id"));
});

From the docs:

Get the first element that matches the selector, beginning at the current element and progressing up through the DOM tree.

Answer 3

Use closest():

$('.anotherclass').click(function () {
     alert($(this).closest('tr').prop('id'));
});