daveygm/cookie.js

## cookie.js
// Write a cookie.
function writeCookie(name, value, days) {
	var expires = "";
	if (days) {
		var date = new Date();
		date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));
		expires = "; expires" + date.toGMTString();
	}
	document.cookie = name + "=" + value + expires + "; path=/";
}

// Check to see if a cookie exists, read and parse the data if it does.
function readCookie(name) {
	var searchName = name + "=";
	var cookies = document.cookie.split(';');
	for (var i=0; i < cookies.length; i++) {
		var c = cookies[i];
		while (c.charAt(0) == ' ') {
			c = c.substring(1, c.length);
		}
		if (c.indexOf(searchName) === 0) {
			return c.substring(searchName.length, c.length);
		}
	}
	return null;
}

// Remove cookie.
function eraseCookie(name) {
	writeCookie(name,"",-1);
}