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 SetCookieDefinitiva (name, value, dias) 
{
    var tiempo=(dias*24*60*60*1000);
    var expiracionCookie=new Date();
    expiracionCookie.setTime(expiracionCookie.getTime() + tiempo);
    expireString=expiracionCookie.toGMTString();
    document.cookie=name + "=" + value + ";expires=" + expireString + ";path=/";
}

function SetCookie (name, value) 
{
	document.cookie=name + "=" + value;
}

function DeleteCookie(name) 
{
	var exp = new Date();
	FixCookieDate (exp);
	exp.setTime (exp.getTime() - 1);
	var cval = GetCookie (name);
	if (cval != null)
	document.cookie = name + "=" + cval + "; expires=" + exp.toGMTString();
}