function getWholeCookie(offset) {
	var endstr = document.cookie.indexOf (';', offset)
		if (endstr ==-1) {
			endstr = document.cookie.length;
		}
		return unescape(document.cookie.substring(offset,endstr));
}

function getCookie(name) {
	var arg = name + '=';
	var argLength = arg.length;
	var cookieLength = document.cookie.length;
	var i = 0;
	while (i < cookieLength) {
		var j = i + argLength;
		if (document.cookie.substring(i,j) == arg) {
			return getWholeCookie(j);
		}
		i = document.cookie.indexOf (' ' ,i) + 1;
		if (i ==0) break;
	}
	return ' ';
}

function setCookie(name, value) {
	document.cookie = name + '=' + escape(value);
}

function tossCookie(name) {
	if (getCookie(name)) {
		document.cookie = name + ' = null; expires=Thu, 01-Jan-2012 00:00:01 GMT';
	}
}