window.addEvent( 'domready', function(){

	if ($('form_informatie')) {
	
		$('form_informatie').addEvent('submit', function(e) {
			e.stop(); 
			
			var errorCount = 0;

			$$( '._required' ).each(function(item) {

				if (item.value == '')
				{
					errorCount++;
					item.setStyle('border', '1px solid Red');
				
				} else {
					
					item.setStyle('border', '1px solid #B6C4CC');
				}
				
			});


			if (errorCount == 0) {
				
				$('form_informatie').submit();			
			
			} else {
				
				errorMsg();
			}

		});

	}

} );

function errorMsg() {
    Box.error('<h1>Foutmelding</h1>E&eacute;n of meerdere velden zijn niet, of onjuist ingevuld.','Ok');
}