Jquery insertAfter() format?

Is there a better way of writing this?

$('<span class="a"></span>').insertAfter($('#email'));
$('<span class="a"&g开发者_运维百科t;</span>').insertAfter($('#username'));
$('<span class="a"></span>').insertAfter($('#password'));
$('<span class="a"></span>').insertAfter($('#password_confirmation'));

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insertAfter can take a query string:

$("<span class=\"a\"></span>").insertAfter("#email,#username,#password,#password_confirmation")

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$('#email,#username,#password,#password_confirmation')
   .insert($('span').attr('class', 'a'));