VersionOne API XML Error Parsing using JS DOMParser

xmlerrorparse.js

xmlstring = 
<Error href="/safetest/rest-1.oauth.v1/Data/Request/602092">
	<Message>Bad Request</Message>
	<Exception class="VersionOne.DataException">
		<Message>Violation'ScopeMustBeActive</Message>
	</Exception>
	<Exception class="System.Data.SqlClient.SqlException">
		<Message>Violation'ScopeMustBeActive</Message>
	</Exception>
</Error>

var parser = new DOMParser();
var docError = parser.parseFromString('INVALID', 'text/xml');

var parsererrorNS = docError.getElementsByTagName("parsererror")[0].namespaceURI;

var doc = parser.parseFromString(xmlstring, 'text/xml');

if (doc.getElementsByTagNameNS(parsererrorNS, 'parsererror').length > 0) {
    throw new Error('Error parsing XML');
}

var rootElement = doc.documentElement;
var children = rootElement.childNodes;

for(var i =0; i< children.length; i++) {
   var child = children[i];
   if(child.nodeType == Node.ELEMENT_NODE)  {
        var api_error = child.getElementsByTagName("Message")[0];
        if(api_error!=undefined){
            console.log(api_error.textContent);
        }
   }
}