create publishing page using JavaScript

hi friends 

i am using below code to create publishing page it is working fine

but my problem is am unable to define name of the page it is creating with default name

i try to use "pageInfo.set_name()" but it is not working

is there any solution. 

var contextPage;
var webPage;
var pubweb;
var pageInfo;
var newPage

function pageCreate(){
	SP.SOD.executeFunc('SP.js','SP.ClientContext',loadFun);
}
function loadFun(){

	contextPage = new SP.ClientContext.get_current();
	webPage= contextPage.get_web();

	pubweb= SP.Publishing.PublishingWeb.getPublishingWeb(contextPage,webPage);

	contextPage.load(webPage);

	contextPage.load(pubweb);

	contextPage.executeQueryAsync(onQuerySuccedPage, onQueryFailedPage);
}
function onQuerySuccedPage(){

	pageInfo = new SP.Publishing.PublishingPageInformation();
	newPage = pubweb.addPublishingPage(pageInfo);
//pageInfo.set_name('test123.aspx')  "it is not working"
	contextPage.load(newPage);
	contextPage.executeQueryAsync(onPageCreate, onQueryFailedPage);	
}

function onPageCreate(){
	alert('page created');
}
function onQueryFailedPage(){
	alert('failed');
}