// Test whether the given DOM element has a current value.
function hasValue(element){
  if( (element != null) && (element.value.length > 0) )  return true;
  return false;
}

// Test whether any of the DOM elements in the given Array have a current value.
function haveValue(elements){
  var elements_have_value = false;
  for( var index = 0; index < elements.length; index++ ){
    elements_have_value = elements_have_value || hasValue(elements[index]);
  }
  return elements_have_value;
}