function hidefield(fieldid) {
  var myfield = document.getElementById(fieldid);   
  if (myfield) {
	myfield.style.visibility = 'hidden';
	myfield.style.display = 'none';  
  }
}

function showfield(fieldid) {
  var myfield = document.getElementById(fieldid);   
  if (myfield) {
	myfield.style.visibility = 'visible';
	myfield.style.display = 'inline';  
  }
}

function setfocus(field) {
	var fieldtofocus = document.getElementById(field); 
	if (fieldtofocus) { 
		fieldtofocus.focus(); 
	}
}

function confirmSubmit(message) {
	var agree=confirm(message);
	if (agree) {
		return true;
	} else {
		return false;
	}
}