/**
 * createCookie - Creates a cookie with Name->Value pair, and will stay active for x hours
 *
 * @date   2019-11-08
 * @author Rick Hays
 * @param  name
 * @param  value
 * @param  hours
 */
function createCookie(name, value, hours)
{
	let expires = "";
	if (hours)
	{
		let date = new Date();
		date.setTime(date.getTime()+(hours*60*60*1000));
		expires='' + date.toUTCString(); //.toGMTString();
	}
	document.cookie = name + '=' + value + '; expires=' + expires + "; path=/";
}

/**
 * readCookie - reads the value of the name->value pair using the name, returns NULL if not found.
 *
 * @date    2019-11-08
 * @author  Rick Hays
 * @param   name
 * @returns {string|null}
 */
function readCookie(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;
}

/**
 * eraseCookie - erases cookie with the name->vaule pair.
 *
 * @date   2019-11-08
 * @author Rick Hays
 * @param  name
 */
function eraseCookie(name)
{
	createCookie(name,"",-1);
}