//data:2008-09-09
//author:evan.bian

//-------------------------------------------
function GetCookieVal(offset)
//获得Cookie解码后的值
{
	var endstr = document.cookie.indexOf (";", offset);
	if (endstr == -1)
	endstr = document.cookie.length;
	return( unescape(document.cookie.substring(offset, endstr)));
}



function SetCookie(name, value)
{
	var expdate = new Date();
	var argv = SetCookie.arguments;
	var argc = SetCookie.arguments.length;
	var expires = (argc > 2) ? argv[2] : null;
	var path = (argc > 3) ? argv[3] : null;
	var domain = (argc > 4) ? argv[4] : null;
	var secure = (argc > 5) ? argv[5] : false;
	var dayRate = 24*60*60*1000;
	if(expires!=null) expdate.setTime(expdate.getTime() + ( expires * dayRate ));
	document.cookie = name + "=" + escape (value) +((expires == null) ? "" : ("; expires="+ expdate.toGMTString()))+((path == null) ? "" : ("; path=" + path)) +((domain == null) ? "" : ("; domain=" + domain))+((secure == true) ? "; secure" : "");
}

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;
}