SO fiddle

Test Fiddle mainly for SO Questions

by Nick Craver

HTML

<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.4/themes/overcast/jquery-ui.css">
<a a="123" b="345">1</a>
<a a="123">2</a>
<a b="345">3</a>

JavaScript

$("a[a=123], a[b=345]").css('color', 'red');