function changeTotal(){
	var type = $('type').value;
	var req = new Request(
		{
		url: '/ajx/ajx.php?act=changeTotal&type='+type,
		onSuccess: function(request){
			request = request*1.0;
			request = request.toFixed(2);
			$('prijs').set('html',request);
			$('hprijs').set('value',request);			
		}
	});
	req.send();
}//changeTotal

function changeStuff(){
	if($('energie').value=='0'){
		$$('.hiddenstuff').each(function(el){
			$(el).setStyle('display','none');		
		});	
		$('sleutel').removeProperty('check');
		$('sleutel').removeProperty('alert');	
		if($chk($('err_sleutel'))) $('err_sleutel').dispose();			
	}else{
		$$('.hiddenstuff').each(function(el){
			$(el).setStyle('display','block');		
		});	
		$('sleutel').setProperty('check','required');
		$('sleutel').setProperty('alert','dit is een verplicht veld');
	}//if
}//changeStuff