function sleep(prmSec) {
	prmSec *= 1000;
	var eDate = null;
	var eMsec = 0;
	var sDate = new Date();
	var sMsec = sDate.getTime();
	do {
		eDate = new Date();
		eMsec = eDate.getTime();
	} while((eMsec-sMsec) < prmSec);
}