function testkontext(that) {
   var f = document.getElementById("loginform");
   var n = document.getElementById("loginname");
   var p = document.getElementById("loginpass");
   //alert(that.selectedIndex);
   if (that.selectedIndex==2) {
     f.action = "https://mail.sssvt.cz/default/dologin.php";
     n.name = "kerio_username";
     p.name = "kerio_password";
   } else {
     f.action = "https://www.sssvt.cz/login.php";
     n.name = "name";
     p.name = "pass";
   }
}