getAbsoluteUrl - get the absolute URL when a string parameter is passed as a argument to the function

getAbsoluteUrl.js

//works in browser only
var getAbsoluteUrl = (function() {
	var a;

	return function(url) {
		if(!a) a = document.createElement('a');
		a.href = url;

		return a.href;
	};
})();

// Usage
getAbsoluteUrl('/something'); // https://davidwalsh.name/something

//How it Works
//the href proprty of the Document Object Model handles all the useless stuff and gets you the absolute URL