function textCounter(field, countfield){
	var maxlength = field.getAttribute("maxlength");
	var length = field.value.length;
	
	if(length <= maxlength){
		$(countfield).innerHTML = '(noch '+(maxlength-length)+')';
	}
}

function is_array(variable){
	return typeof(variable) == "object" && (variable instanceof Array);
}

function masscheck(activate, name){
	var checkboxen = document.getElementsByName(name);
	var laenge = checkboxen.length;
	for(var i=0;i<laenge;i++){
		if(activate){
			checkboxen[i].checked = true;
		}
		else{
			checkboxen[i].checked = false;
		}
	}
	return true;
}

function toggle_menu(active){
	$$('#menuwhite li a').each(function(item) {
		id = item.identify();
		if(id == active){
			item.toggleClassName("current");
			$('content_' + id).show();
		}
		else{
			item.removeClassName("current");
			$('content_' + id).hide();
		}
	});
	
}