/**
 * Functions for handling cookies
 *
 * @author	Paul Pinkney
 */
function getCookieValue(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 getCookieValue(j);
		}
		i = document.cookie.indexOf(" ", i) + 1;
		if (i == 0)
		{
		    break; 
		}
	}
	return null;
}

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