function validateNewsletter(myform) {
	msg = "";
	if(myform.vorname.value==""){
		msg += myform.vorname_error.value+"\n";
	}
	if(myform.nachname.value==""){
		msg += myform.nachname_error.value+"\n";
	}
	if(myform.email.value==""){
		msg += myform.email_error.value+"\n";
	}else{
		if (/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,})+$/.test(myform.email.value)){
			//OK
		}else{
			msg += myform.email_error.value+"\n";
		}
	}
	if(!myform.agb.checked){
		msg += myform.agb_error.value+"\n";
	}
	if(msg!=""){
		alert(msg);
		return false;
	}
}


function ShowHide(id) {
	obj = document.getElementById(id);
	if (obj.style.display == 'none') {
		obj.style.display = 'block';
	}else{
		obj.style.display = 'none';
	}
}


function changeImg(image, imageIndex)
{
	document.images[imageIndex].src = image;
	return false;
}