JSONP fucntion. (Cross-domain request)

jsonp-usage.js

doJSONP('http://some.url/', function (data) {
  console.log(data);
});

jsonp.js

function doJSONP (url, callback) {
	var	request = ('request'+ Math.random()).replace('.',''),
	    head    = document.getElementsByTagName('head')[0],
	    script  = document.createElement('script');
	script.charset = 'UTF-8';
	script.src     = url + '?callback=' + id;
	head.appendChild(script);
	window[id] = function (data) {
		callback(data);
		console.log('Callback was called');
		delete window[id];
		head.removeChild(script);
	};
}