// see http://www.hidaho.com/cookies/cookie.txt
function getCookieVal (offset) {
	var endstr = document.cookie.indexOf (";", offset);
	if (endstr == -1)
		endstr = document.cookie.length;
	return unescape(document.cookie.substring(offset, endstr));
}
//  IMPORTANT:  This function should only be called *once* for any given date object!  See example at the end of this document.
function FixCookieDate (date) {
	var base = new Date(0);
	var skew = base.getTime(); // dawn of (Unix) time - should be 0
	if (skew > 0)  // Except on the Mac - ahead of its time
		date.setTime (date.getTime() - skew);
}
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 to create or update a cookie.
	//    name - String object containing the cookie name.
	//    value - String object containing the cookie value.  May contain
	//      any valid string characters.
	//    [expires] - Date object containing the expiration data of the cookie.  If
	//      omitted or null, expires the cookie at the end of the current session.
	//    [path] - String object indicating the path for which the cookie is valid.
	//      If omitted or null, uses the path of the calling document.
	//    [domain] - String object indicating the domain for which the cookie is
	//      valid.  If omitted or null, uses the domain of the calling document.
	//    [secure] - Boolean (true/false) value indicating whether cookie transmission
	//      requires a secure channel (HTTPS).  
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 to delete a cookie. (Sets expiration date to start of epoch)
	//    name -   String object containing the cookie name
	//    path -   String object containing the path of the cookie to delete.  This MUST
	//             be the same as the path used to create the cookie, or null/omitted if
	//             no path was specified when creating the cookie.
	//    domain - String object containing the domain of the cookie to delete.  This MUST
	//             be the same as the domain used to create the cookie, or null/omitted if
	//             no domain was specified when creating the cookie.
	//
function DeleteCookie (name,path,domain) {
	if (GetCookie(name)) {
		document.cookie = name + "=" +
			((path) ? "; path=" + path : "") +
			((domain) ? "; domain=" + domain : "") +
			"; expires=Thu, 01-Jan-70 00:00:01 GMT";
	}
}

function ReadCookie(CookieName){
	return GetCookie(CookieName); // backwards compatibility
}
/* Examples
var expdate = new Date ();
FixCookieDate (expdate); // Correct for Mac date bug - call only once for given Date object!
expdate.setTime (expdate.getTime() + (24 * 60 * 60 * 1000)); // 24 hrs from now 
SetCookie ("ccpath", "http:\//www.hidaho.com/colorcenter/", expdate);
SetCookie ("ccname", "hIdaho Design ColorCenter", expdate);
SetCookie ("tempvar", "This is a temporary cookie.");
SetCookie ("ubiquitous", "This cookie will work anywhere in this domain",null,"/");
SetCookie ("paranoid", "This cookie requires secure communications",expdate,"/",null,true);
SetCookie ("goner", "This cookie must die!");
document.write (document.cookie + "<br>");
DeleteCookie ("goner");
document.write (document.cookie + "<br>");
document.write ("ccpath = " + GetCookie("ccpath") + "<br>");
document.write ("ccname = " + GetCookie("ccname") + "<br>");
document.write ("tempvar = " + GetCookie("tempvar") + "<br>");
*/