function getCookie (name) {
	var arg = name + "=";
	var alen = arg.length;
	var clen = window.document.cookie.length;
	var i = 0;
	while (i < clen) {
		var j = i + alen;
		if (window.document.cookie.substring(i, j) == arg) return getCookieVal (j);
		i = window.document.cookie.indexOf(" ", i) + 1;
		if (i == 0) break;
	}
	return null;
}

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

function setCookie (name, value) {
	var exp = new Date();
	exp.setTime(exp.getTime() + (30*24*60*60*1000));
	//window.document.cookie = name + "=" + escape (value) + "; expires=" + exp.toGMTString()+";path=/";
	window.document.cookie = name + "=" + escape (value) + "; path=/";
}

function deleteCookie (name) {
	window.document.cookie = name + "=;path=/";
}