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function getNextGMTstring(interval)
{
	var GMTstring;

	Today = new Date();
	GMTstring = Today.toGMTString();

	if ( interval > 0 ) {
		// add interval
		hours = Today.getHours() + interval;
		if ( interval<24 && hours>24 ) hours = hours - 24;

		Today.setHours(hours);
		GMTstring = Today.toGMTString();

	}

	return GMTstring;

}

function useful(idx, interval)
{
	if ( getCookie("reviewNum").indexOf(idx+",") > -1 )
		return false;
	pidx = getCookie("reviewNum");
	nidx = pidx + idx + ",";
	GMTstring = getNextGMTstring(interval);
	setCookie("reviewNum", nidx, GMTstring)
	return true;
}

function useless(idx, interval)
{
	if ( getCookie("reviewNum").indexOf(idx+",") > -1 )
		return false;
	pidx = getCookie("reviewNum");
	nidx = pidx + idx + ",";
	GMTstring = getNextGMTstring(interval);
	setCookie("reviewNum", nidx, GMTstring)
	return true;
}

function writeReviewCid(idx, interval)
{
	if ( getCookie("reviewCid").indexOf(idx+"|") > -1 )
		return false;
	pidx = getCookie("reviewCid").replace(/,/g , '|');
	nidx = pidx + idx + "|";
	GMTstring = getNextGMTstring(interval);
	setCookie("reviewCid", nidx, GMTstring)
	return true;
}

function writeReviewCpn(idx, interval)
{
	if ( getCookie("reviewCpn").indexOf(idx+"|") > -1 )
		return false;
	pidx = getCookie("reviewCpn").replace(/,/g , '|');
	nidx = pidx + idx + "|";
	GMTstring = getNextGMTstring(interval);
	setCookie("reviewCpn", nidx, GMTstring)
	return true;
}


function checkReviewCid(idx, interval)
{
	if ( getCookie("reviewCid").indexOf(idx+"|") > -1 )
		return false;
	else
		return true;
}

function checkReviewCpn(idx, interval)
{
	if ( getCookie("reviewCpn").indexOf(idx+"|") > -1 )
		return false;
	else
		return true;
}


function valuationReviewCid(idx, interval)
{
	if ( getCookie("valuationCid").indexOf(idx+"|") > -1 )
		return false;
	pidx = getCookie("valuationCid").replace(/,/g , '|');
	nidx = pidx + idx + "|";
	GMTstring = getNextGMTstring(interval);
	setCookie("valuationCid", nidx, GMTstring)
	return true;
}

function valuationReviewCpn(idx, interval)
{
	if ( getCookie("valuationCpn").indexOf(idx+"|") > -1 )
		return false;
	pidx = getCookie("valuationCpn").replace(/,/g , '|');
	nidx = pidx + idx + "|";
	GMTstring = getNextGMTstring(interval);
	setCookie("valuationCpn", nidx, GMTstring)
	return true;
}