function areaChanged(){
  if ($F('entityArea') == 0 || $F('entityArea') == 9790 ){
    Element.hide('vognTypeContainer');
    Element.hide('brandContainer');
    $('brandContainer').value='';
    $('entityType').selectedIndex = 0;
  }
  else{
    Element.show('vognTypeContainer');
  }
}

function vognChanged(){
  if ( $F('entityType') == 0 ){
    Element.hide('brandContainer');
    $('brandContainer').value='';
  }
  else { 
	//showWorkingIcon();
	
		var url = '/default_prototype.asp';
		var pars = 'entityType=' + $F('entityType');
		var myAjax = new Ajax.Updater(
			'brandContainer',
			url,
			{
				method: 'post', 
				parameters: pars //,
				//onComplete: hideWorkingIcon
			});
			
	  Element.show('brandContainer');
	}
}

function forhandler_pageLoaded(evt){
  areaChanged();
  vognChanged();
}
Event.observe(window, 'load', forhandler_pageLoaded, false);