function emailValidation() {
	var isLoggedIn = document.getElementById("isLoggedIn");
	if(isLoggedIn.value=="false")
	{
		var mail = document.getElementById("email");
		if(mail.value == messages[2]){
			return false;
		}

		if(mail.value!=""){
			var checkM = new RegExp("^[\\w-_\.]*[\\w-_\.]\@[\\w]\.+[\\w]+(\.[\\w]+)+$");
			var checkM = checkM.exec(mail.value);
			if (checkM == null)
				return false;
			else
				return true;
		}
	}
	else
		return true;
}

function titleValidation() {
	var title = document.getElementById("titel");
	if(title.value == messages[0]){
		return false;
	}
	if (title.value == "")
		return false;
	else
		return true;
}

function commentValidation() {
	var comment = document.getElementById("kommentar");
	if(comment.value == messages[1]){
		return false;
	}

	if (comment.value == "")
		return false;
	else
		return true;
}

function validationField(){

	var mail    = emailValidation();
	var comment = commentValidation();
	var titleV   = titleValidation();

	if(!titleV){
		alert(messageError[1]);
		return;
	}

	if(!mail){
		alert(messageError[0]);
		return;
	}

	if(!comment){
		alert(messageError[2]);
		return;
	}

	document.comment_form.submit();
}
function goToLogin(loginUrl){
	document.location = loginUrl;
}

function clearFormElement(obj){

	if(obj.value==messages[2]){
		obj.value = "";
	 }
	if(obj.value==messages[1]){
		obj.value = "";
	 }
	if(obj.value==messages[0]){
		obj.value = "";
	 }
}
function initialFormElement(obj){
	message ="";
	if(obj.value =="")
	{
		if(obj.name=="email"){
			message= messages[2];
		 }
		if(obj.name=="kommentar"){
			message= messages[1];
		 }
		if(obj.name=="titel"){
			message= messages[0];
		 }
		 obj.value = message;
	}
}