array join

HTML

<script src="https://getfirebug.com/firebug-lite.js"></script>

JavaScript

var names = ['james','edward','josef','gotsell']

console.log(names.join(' '))

// see console for output

var name = 'james edward josef osbourne';

var upper = name.split(' ') // [shane, osbourne]
.map(x => x.charAt(0).toUpperCase() + x.slice(1)) // [Shane, Osbourne]
.join(' ');

console.log(upper);