function checkMandatText(names){
	var ok = true;
	for(var i = 0; i<arguments.length; i++){
		e = document.getElementById(arguments[i]);
		if(e.value == "")ok = false;
	}
	if(!ok) alert('Please fill both user and password fields.');
	return ok;
}

function showElements(show,names)
{
	if (show) show = '';
	else show = 'none';
	var e;
	for (var i = 1; i < arguments.length; i++) {
		e = document.getElementById(arguments[i]);
		if (e) e.style.display = show;
	}
}

function checkForm(formobj){
	if(formobj.sel_room.selectedIndex == -1){
		alert("Please select a room.");
		return false;
	}
	else if(!formobj.sel_level[0].checked && !formobj.sel_level[1].checked && !formobj.sel_level[2].checked){
		alert("Please select a level.");
		return false;
	}
	else return true;
	
}