function check_n_submit(form_id){
	var form = document.getElementById(form_id);
	var info = document.getElementById(form_id + "_info");
	var i = 0;
	var abbruch = false;
	var el;
	
	while(arguments[i] != null && abbruch == false){
		el = document.getElementById(arguments[i]);
		if(el.value != null && el.value == ''){
			abbruch = true;
		}
		
		i++;
	}

	if(abbruch == false){
		form.submit();
	} else {
		info.style.display = 'block';
	}

}