function setCookie(cookieName, cookieValue, cookieExpire){
	document.cookie = cookieName + "=" + escape(cookieValue) + ((cookieExpire == null)?"":("; expires=" + cookieExpire.toGMTString()));
}

function getCookie(cookieName) {
	var search = cookieName + "=";
	if (document.cookie.length > 0) {
		offset = document.cookie.indexOf(search);
		if (offset != -1) {
			offset += search.length;
			end = document.cookie.indexOf(";", offset);
			if (end == -1)
				end = document.cookie.length;
			return unescape(document.cookie.substring(offset, end));
		}
	}
	return false;
}

function delCookie(cookieName, cookieValue){
	today = new Date();
	cookieExpire = new Date();
	cookieExpire.setTime(today.getTime());
	setCookie(cookieName, cookieValue, cookieExpire);
}