function logon(){
    var leftPos = (screen.availWidth-400) / 2
    var topPos = (screen.availHeight-300) / 2 
    window.open("http://shop.flauenskjold.dk/includes/login.asp","logon","width=400,height=300,top="+topPos+",left="+leftPos+"")
}

function logout(){
    var leftPos = (screen.availWidth-400) / 2
    var topPos = (screen.availHeight-300) / 2 
    window.open("http://shop.flauenskjold.dk/includes/login.asp","logon","width=400,height=300,top="+topPos+",left="+leftPos+"")
//http://shop.flauenskjold.dk/includes/logoff.asp
}