attributeHas(attribute) matches elements that have the specified attribute. : Selector Attribute « jQuery « JavaScript Tutorial

<html>
  <head>
    <script type="text/javascript" src="js/jquery-1.3.2.js"></script>
    <script type="text/javascript">
        $(document).ready(function(){
            $("div[id]").one("click", function(){
              var idString = $(this).text() + " = " + $(this).attr("id");
              $(this).text(idString);
            });
        });
    </script>

  </head>
  <body>
    <body>
      <div>no id</div>
      <div id="hey">with id</div>
    </body>
</html>

30.3.Selector Attribute
	30.3.1.	Select attribute and it ends with a certain value
	30.3.2.	Select attribute value
	30.3.3.	Select attribute: not equals
	30.3.4.	Select attribute: start with
	30.3.5.	Select attribute value: match value
	30.3.6.	Select attribute by value
	30.3.7.	Get by attribute
	30.3.8.	match all of the specified attribute filters
	30.3.9.	attributeNotEqual(attribute, value) matches elements that don't have the specified attribute
	30.3.10.	attributeMultiple(selector1, selector2, selectorN) matches elements with specified attribute
	30.3.11.	attributeHas(attribute) matches elements that have the specified attribute.
	30.3.12.	attributeEquals(attribute, value) matches elements with the specified attribute
	30.3.13.	attributeEndsWith(attribute, value): have the specified attribute and it ends with a certain value.
	30.3.14.	attributeContains(attribute, value) matches specified attribute