Question

I tried to select all the tr’s that have id’s that contain a variable.
It’s supposed to hide elements that don’t match as the user types into the search form.
The form has an id of #search.

$(function () {
      var content = $('#search').val();
      $('#search').keyup(function () {
          if ($('#search').text() != content) {
              content = $('#search').val();
              //content has changed, do stuff
              if (!$('tr.id:contains(content)')) {
                  $('this').hide();
              }
          }
      });
  });

Answer 1

You could try this:

$('tr[id*=' + content + ']').hide();

The *= thing in an attribute match clause says to match any tag that’s got the indicated attribute with a value that contains the substring on the right, which I think is exactly what you’re asking for.