function show_memory() 
{
window.open("http://www.azu.de/login/memory/memory.php?pin=56555743","Memory","width=575,height=525");
}

function show_brain() 
{
window.open("http://www.azu.de/login/gedaechtnis/index.php?pin=56555743","Test","width=565,height=525");
}