function ffocus(handle, def){
	if(handle.value == def){
		handle.value = '';
	}
}
function fblur(handle, def){
	if(handle.value == ''){
		handle.value = def;
	}
}
function validate_callback(){
	if(document.callback_form.cb_name.value == 'Ihr Name'){
		alert('Bitte geben Sie Ihren Namen ein!');
		return false;
	}else if(document.callback_form.cb_fon.value == 'Ihre Telefonnummer'){
		alert('Bitte geben Sie Ihren Telefonnummer ein!');
		return false;
	}else{
		return true;
	}
}
function switch_drops(id){
	var dropcount = 0;
	while(document.getElementById('drop' + id + '.' + dropcount)){
		if(document.getElementById('drop' + id + '.' + dropcount).style.display == 'none'){
			document.getElementById('drop' + id + '.' + dropcount).style.display = 'block';
		}else{
			document.getElementById('drop' + id + '.' + dropcount).style.display = 'none';
		}
		dropcount++;
	}
}
function open_drops(id){
	var dropcount = 0;
	while(document.getElementById('drop' + id + '.' + dropcount)){
		document.getElementById('drop' + id + '.' + dropcount).style.display = 'block';
		dropcount++;
	}
	return dropcount;
}
function open_all_drops(){
	var id = 0;
	var dropcount = 0;
	while(open_drops(id) > 0){
		id++;
	}
}