void removeAttribute(String name);
name
The name of the attribute to be deleted.
This method may throw a DOMException with a code of NO_MODIFICATION_ALLOWED_ERR if this element is read-only and does not allow its attributes to be removed.
removeAttribute( ) deletes a named attribute from this element. If the named attribute has a default value specified by the document type, subsequent calls to getAttribute( ) will return that default value. Attempts to remove nonexistent attributes or attributes that are not specified but have a default value are silently ignored.
Element.getAttribute( ), Element.setAttribute( ), Node.attributes