Accessibility in JavaScript (ES5) Tab control

ej.base.enableRipple(true);

//Initialize Tab component

var tabObj = new ej.navigations.Tab({
    heightAdjustMode: 'Auto',
    overflowMode: 'Popup',
    items: [
        {
            header: { 'text': 'HTML' },
            content: 'HyperText Markup Language, commonly referred to as HTML, is the standard markup language used to create web ' +
            'pages. Along with CSS, and JavaScript, HTML is a cornerstone technology, used by most websites to create visually ' +
            'engaging web pages, user interfaces for web applications, and user interfaces for many mobile applications.[1] Web ' +
            'browsers can read HTML files and render them into visible or audible web pages. HTML describes the structure of a ' +
            'website semantically along with cues for presentation, making it a markup language, rather than a programming language.'
        },
        {
            header: { 'text': 'C Sharp(C#)' },
            content: 'C# is intended to be a simple, modern, general-purpose, object-oriented programming language. Its development ' +
            'team is led by Anders Hejlsberg. The most recent version is C# 5.0, which was released on August 15, 2012.'
        },
        {
            header: { 'text': 'Java' },
            content: 'Java is a set of computer software and specifications developed by Sun Microsystems, later acquired by Oracle ' +
            'Corporation, that provides a system for developing application software and deploying it in a cross-platform computing ' +
            'environment. Java is used in a wide variety of computing platforms from embedded devices and mobile phones to ' +
            'enterprise servers and supercomputers. While less common, Java applets run in secure, sandboxed environments to ' +
            'provide many features of native applications and can be embedded in HTML pages.'
        },
        {
            header: { 'text': 'VB.Net' },
            content: 'The command-line compiler, VBC.EXE, is installed as part of the freeware .NET Framework SDK. Mono also ' +
            'includes a command-line VB.NET compiler. The most recent version is VB 2012, which was released on August 15, 2012.'
        },
        {
            header: { 'text': 'Xamarin' },
            content: 'Xamarin is a San Francisco, California based software company created in May 2011[3] by the engineers that ' +
            'created Mono,[4] Mono for Android and MonoTouch that are cross-platform implementations of the Common Language ' +
            'Infrastructure (CLI) and Common Language Specifications (often called Microsoft .NET). With a C#-shared codebase, ' +
            'developers can use Xamarin tools to write native Android, iOS, and Windows apps with native user interfaces and share ' +
            'code across multiple platforms.[5] Xamarin has over 1 million developers in more than 120 countries around the World ' +
            'as of May 2015.'
        },
        {
            header: { 'text': 'ASP.NET' },
            content: 'ASP.NET is an open-source server-side web application framework designed for web development to produce ' +
            'dynamic web pages. It was developed by Microsoft to allow programmers to build dynamic web sites, web applications ' +
            'and web services. It was first released in January 2002 with version 1.0 of the .NET Framework, and is the successor ' +
            'to Microsoft\'\s Active Server Pages (ASP) technology. ASP.NET is built on the Common Language Runtime (CLR), allowing ' +
            'programmers to write ASP.NET code using any supported .NET language. The ASP.NET SOAP extension framework allows ' +
            'ASP.NET components to process SOAP messages.'
        },
        {
            header: { 'text': 'ASP.NET MVC' },
            content: 'The ASP.NET MVC is a web application framework developed by Microsoft, which implements the ' +
            'model–view–controller (MVC) pattern. It is open-source software, apart from the ASP.NET Web Forms component which is ' +
            'proprietary. In the later versions of ASP.NET, ASP.NET MVC, ASP.NET Web API, and ASP.NET Web Pages (a platform using ' +
            'only Razor pages) will merge into a unified MVC 6.The project is called ASP.NET vNext.'
        },
        {
            header: { 'text': 'JavaScript' },
            content: 'JavaScript (JS) is an interpreted computer programming language. It was originally implemented as part of ' +
            'web browsers so that client-side scripts could interact with the user, control the browser, communicate ' +
            'asynchronously, and alter the document content that was displayed.[5] More recently, however, it has become common in ' +
            'both game development and the creation of desktop applications.'
        }
    ]
});

//Render initialized Tab component
tabObj.appendTo('#element');

<!DOCTYPE html><html lang="en"><head>
    <title>Essential JS 2 Tab</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta name="description" content="Essential JS 2 Tab">
    <meta name="author" content="Syncfusion">
    <link href="index.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/material.css" rel="stylesheet">
    
    
<script src="https://cdn.syncfusion.com/ej2/dist/ej2.min.js" type="text/javascript"></script>
</head>

<body>
    
    <div id="container">
        <div id="element">
        </div>
        <br><br>
        <div id="result"></div>
    </div>


<script>
var ele = document.getElementById('container');
if(ele) {
    ele.style.visibility = "visible";
 }   
        </script>
<script src="index.js" type="text/javascript"></script>
</body></html>