N/xml Module
Document.getElementsByTagName()
Method Description: Returns an array of xml.Element objects with a specific tag name, in the order in which they appear in the XML document.
Returns: xml.Element[]
Supported Script Types: All script types For more information, see SuiteScript 2.0 Script Types.
Governance: None
Module: N/xml Module
Since: 2015.2
Search NetSuite - https://system.netsuite.com/app/help/helpcenter.nl?search=Document.getElementsByTagName(options)

// Code Example 1

//Add additional code

//...

var elem = xmlDocument.getElementsByTagName({

    tagName : 'book'

});

//...

//Add additional code



//SOURCE: https://system.netsuite.com/app/help/helpcenter.nl?fid=section_457710510253.html