cookies.js

/*
three functions to manage cookies via javascript
*/

function createCookie(name, value, days) {
	var expires;

	if (days) {
		var date = new Date();
		date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));
		expires = "; expires=" + date.toGMTString();
	} else {
		expires = "";
	}
	document.cookie = encodeURIComponent(name) + "=" + encodeURIComponent(value) + expires + "; path=/";
}

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

function eraseCookie(name) {
	createCookie(name, "", -1);
}

three functions to manage cookies via javascript