<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
<script>window.jQuery || document.write('<script src="/assets/js/vendor/jquery.min.js"><\/script>')</script>
<head>
<script src="/js/head.js" type="text/javascript" />
</head>head.load(
'https://code.jquery.com/jquery-2.2.2.min.js',
'/js/script1.js',
'/js/script2.js'
);
head.ready( function() {
// скрипты загружены, можно работать
} );