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hasAttribute (method )

Owning interface and usage:  
Element.hasAttribute(name)

Member of these other interfaces:  
none

Description:  
Returns true when an attribute with a given name is specified on this element or has a default value, false otherwise.

Parameters:  
DOMString name  -  The name of the attribute to look for.

Returns:  
Boolean -  true if an attribute with a given name is specified on this element or has a default value, false otherwise.

Exceptions:  
none


Example:
Text in the first DIV.
Some text in the second DIV.
Some text and element in the third DIV.
We can try another elements. It will be much more interesting.
Text in the last DIV.
Source: 
   <div id="doc">
     <div>
       Text in the first DIV.
     </div>
     <div id="DDD" class="secondClass">
       Some text in the second DIV.
     </div>
     <div class="thirdClass">
       Some text and <span id="SSS">element</span> in the third DIV.
     </div>
     <div class="fourthClass">
       We can try <i>another elements</i>.
       It will be much more <b>interesting</b>.
     </div>
     <div>
       Text in the last DIV.
     </div>
   </div>
JavaScript: 
  var elem1 = document.getElementById('doc');
  var elem2 = document.getElementById('DDD');
  var output1 = elem1.hasAttribute('class');
  var output2 = elem2.hasAttribute('class');
Output:
desired your browser
output1: false
output2: true