function getCookieVal (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 alen = arg.length;
	var clen = document.cookie.length;
	var i = 0;
	while (i < clen) {

		var j = i + alen;
		if (document.cookie.substring(i, j) == arg)
		return getCookieVal (j);
		i = document.cookie.indexOf(" ", i) + 1;
		if (i == 0) break;

	}
	return null;

}
function SetCookie (name, value, expires, path, domain, secure) {

    document.cookie = name + "=" +escape(value) +
        ( (expires) ? ";expires=" + expires.toGMTString() : "") +
        ( (path) ? ";path=" + path : "") + 
        ( (domain) ? ";domain=" + domain : "") +
        ( (secure) ? ";secure" : "");


}
function DeleteCookie (name) {

	var exp = new Date();
	exp.setTime (exp.getTime() - 1);  // This cookie is history
	var cval = GetCookie (name);
	document.cookie = name + "=" + cval + "; expires=" + exp.toGMTString();

}