var dateTime = new Date();
var timeStep = 3600 * 12; // 时间间隔(秒)	(3600 * 12 = 12个小时)
var cookieName = 'TimeVisitorDo';

var debugVisitorDo = false;
if (debugVisitorDo)
{
	timeStep = 1;
}

var timeVisitorDo = GetCookie(cookieName);
timeVisitorDo = new Date(timeVisitorDo);
if (timeVisitorDo == null)
{
	AddCookie(cookieName, dateTime, expires, path, domain, secure);

	VisitorDo();
}
else
{
	var timeDiff = (dateTime.getTime() - timeVisitorDo.getTime()) / 1000;

	if (timeDiff > timeStep) // 超过时间间隔
	{
		AddCookie(cookieName, dateTime, expires, path, domain, secure);

		VisitorDo();
	}
}

function VisitorDo()
{
	if (debugVisitorDo)
	{
		alert('VisitorDo');
		document.write('<iframe style="width: 800px; height: 200px;" src="/AutoCreateIndexHtml.aspx"></iframe>');
	}
	else
	{
		document.write('<iframe style="width:0px; height: 0px;" src="/AutoCreateIndexHtml.aspx"></iframe>');
	}
}