function empty() {
	document.forms[0].reset();
}

function check($wat) {
	var i,errors='';
	
	var args = new Array('company','contactpersonname','email');
	
	for(i=0;i<(args.length);i++) {
		if (document.getElementById(args[i]).value == "") {
			errors += "- "+args[i]+" is mandatory.\n";
		}
	}
	
	if (errors) { 
		alert(errors);
		document.getElementById('enterknop').style.display = '';
	}
	
	return r = (errors == '');
}