function adsiIsInBusinessHours(callback) {
  var xhttp = new XMLHttpRequest();
  xhttp.onreadystatechange = function() {
	if (xhttp.readyState != 4) return;
	if (!callback) return;
	if (xhttp.status == 200) {
	  callback((xhttp.responseText == "true"));
	}
	else {
	  callback();
    }
  };
  xhttp.open("GET", "https://www.kiocloud.com/isinbushous.wsvc", true);
  xhttp.send();
}