load-as-promised.js

function load(url) {
	
	return new Promise( function(resolve, reject) {
		
		var d= document.createElement('script')
		d.src = url
		d.addEventListener('onload', onload, true)
		document.body.appendChild(d)
	
		function onload(e) {
			resolve (e.target)
		}
	}
}