Include javascript file

include.js

function include(files) {
	if (typeof(files) == 'string') files = [files];
	var onload;
	var script = document.createElement('script');
	var file = files.shift();
	script.setAttribute('type', 'text/javascript');
	script.setAttribute('src', file);
	document.body.appendChild(script);
	if (files.length > 0) {
		onload = function() { include(files); }
		script.onreadystatechange = onload;
		script.onload = onload;
	}
}