function setCookie(name, value, years){
	let expires = "";
	if (years){
		let date = new Date();
		date.setTime(date.getTime() + (years * 365 * 24 * 60 * 60 * 1000));
		expires = "; expires=" + date.toUTCString();
	}
	document.cookie = name + "=" + value + expires + "; path=/";
}

function getCookie(name){
	let nameEQ = name + "=";
	let ca = document.cookie.split(';');
	for (let i = 0; i < ca.length; i++){
		let c = ca[i];
		while (c.charAt(0) == ' ') c = c.substring(1, c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length, c.length);
	}
	return null;
}

function deleteCookies(){
	for (let i = 0; i < arguments.length; i++) setCookie(arguments[i], "", -1);
}

function deleteAllCookies(){
	let cookies = document.cookie.split(";");
	for (let i = 0; i < cookies.length; i++) deleteCookies(cookies[i].split("=")[0]);
}