JavaScript Random Unique Key Generator

Sometimes you may need to generate a unique key id at client side for your web application.

Following JavaScript snippet allows you to generate unique key randomly (look like GUID).

function guid() {
	return s4() + s4() + '-' + s4() + '-' + s4() + '-' + s4() + '-' + s4() + s4() + s4();
}

function s4() {
	return Math.floor((1 + Math.random()) * 0x10000)
				.toString(16)
				.substring(1);
}

document.getElementById('myID').addEventListener('click', function() {
	document.getElementById('myResult').value = guid();
})