function formValid(form){
	if(notEmpty(form.name)){
	if(notEmpty(form.surname)){
	if(notEmpty(form.position)){
	if(notEmpty(form.organisation)){
	if(notEmpty(form.address)){
	if(notEmpty(form.city)){
	if(notEmpty(form.province)){
	if(notEmpty(form.code)){
	if(notEmpty(form.country)){
	if(notEmpty(form.telephone)){
	if(notEmpty(form.faxen)){
	if(notEmpty(form.emailen)){
	if(notEmpty(form.title)){
	if(notEmpty(form.authors)){
	if(notEmpty(form.abstract)){
	return true;
	}
	}
	}
	}
	}
	}
	}
	}
	}
	}	
	}
	}
	}
	}
	}
	return false;
}
function notEmpty(element){
	var string = element.value;
	if(string.length == 0){
		alert("Please, complete all required fields. Thank you!");
		return false;
		}
	else {
		return true;
	}
}