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setAttributeNodeNS (method )

Owning interface and usage:  
Element.setAttributeNodeNS(newAttr)

Member of these other interfaces:  
none

Description:  
Adds a new attribute.

Parameters:  
Attr newAttr  -  The Attr node to add to the attribute list.

Returns:  
Attr -  If the newAttr attribute replaces an existing attribute with the same local name and namespace URI, the replaced Attr node is returned, otherwise null is returned.

Exceptions:  
DOMException WRONG_DOCUMENT_ERR
Raised if newAttr was created from a different document than the one that created the element.
DOMException NO_MODIFICATION_ALLOWED_ERR
Raised if this node is readonly.
DOMException INUSE_ATTRIBUTE_ERR
Raised if newAttr is already an attribute of another Element object. The DOM user must explicitly clone Attr nodes to re-use them in other elements.

Note:  
If an attribute with that local name and that namespace URI is already present in the element, it is replaced by the new one.


Example:
Text in the first DIV.
x a b x
Text in the last DIV.
Source: 
   <div id="doc" xmlns:svg="http://www.w3.org/2000/svg">
     <div>
       Text in the first DIV.
     </div>
     <svg:svg id="logo" xmlns:xlink="http://www.w3.org/1999/xlink" width="200" height="60">
       <svg:g style="fill:#3399cc; font-size:36pt; font-family:'dialog'; font-weight: bold">
         <svg:a xlink:type="simple" xlink:href="http://www.zvon.org">
           <svg:text x="50%" y="65%" text-anchor="middle">ZVON.org</svg:text>
         </svg:a>
       </svg:g>
     </svg:svg>
     <apply xmlns="http://www.w3.org/1998/Math/MathML">
   <int/> 
   <bvar> 
     <ci> x </ci> 
   </bvar> 
   <interval> 
     <ci> a </ci> 
     <ci> b </ci> 
   </interval> 
   <apply>
     <cos/> 
     <ci> x </ci> 
   </apply> 
     </apply> 
     <div>
       Text in the last DIV.
     </div>
   </div>
JavaScript: 
  var elem = document.getElementById('doc');
  var attr = document.createAttributeNS('http://zvon.org/namespaces/test', 'zvon:temp');
  attr.value = 'temporary';
  elem.setAttributeNodeNS(attr);
  var output = elem.getAttributeNodeNS('http://zvon.org/namespaces/test', 'zvon:temp').value;
Output:
desired your browser
temporary