function isFieldEmpty(field) {
  if (document.getElementById(field).value == "") {
    document.getElementById(field).focus();
		return true;
	}
	return false;
}

function isFieldEmail(field) {
  if (!/[a-zA-Z0-9._-]+@[a-zA-Z0-9.-]+\.[a-zA-Z0-9.-]{2,4}$/.test(document.getElementById(field).value)) {
		document.getElementById(field).focus();
		return true;
	}
	return false;
}

function getPriceInformation(type) {

  sNumber = parseInt($('#sNumber_'  + type).val());
  /*if (sNumber > 150 || sNumber < 1) {
    alert("Please choose a number between 1-150");
    return false;
  }*/
  $.getJSON('/wbg/modules/components/getPriceInformation.php?type=' + type + '&sNumber=' + sNumber + '&sPeriod=' + $('#sPeriod_'  + type).val(),
			onGetPriceInformation);
}

function onGetPriceInformation(data) {
  if (data["error"]) {
    $('#liNumber_' + data["type"]).attr("style", "display:block");
    $('#sNumber_' + data["type"]).val(data["nUsers"]);
  }
  else {
    $('#liNumber_' + data["type"]).attr("style", "display:none"); 
    $('#totalPrice_' + data["type"]).html('$ ' + data["total"]);
    $('#pricePerPeriod_' + data["type"]).html('$ ' + data["pPrice"]);
  } 
}