function chkForm() {

	var field = new Array();
	var message = new Array();
	var fieldfocus = '';
	var textalert = '';
	var mid = 0;

	if (document.Form.email.value == false) {
		field[mid] = 'email';
		message[mid] = 'E-Mail';
		mid++;
	}
	else if (document.Form.email.value.indexOf('@') == -1) {
		field[mid] = 'email';
		message[mid] = 'E-Mail (ungueltiges Format)';
		mid++;
	}

	if (mid > 0) {
		fieldfocus = field[0];
		for (i = 0; i < message.length; i++) {
			textalert = textalert+message[i]+'\n';
		}
		alert('Bitte fuellen Sie folgende Pflichtfelder aus:\n\n'+textalert+'');
		document.Form.elements[fieldfocus].focus();
		return false;
	}
	else {
		return true;
	}
}