function setFlipped(val) {

  var flipped = val;

}  /* Frame-Status setzen */


function flip() {

 if (flipped) {
  var up = "super"; var down = "sub";
  flipped = false;
 } else {
  var up = "sub"; var down = "super";
  flipped = true;
 }

 document.getElementById(down).style.zIndex = "2";  
 document.getElementById(down).style.visibility = "hidden";

 document.getElementById(up).style.zIndex = "3";  
 document.getElementById(up).style.visibility = "visible";

} /* Frame-Status wechseln */


function openSuper(url) {

 if (url) {

  frames[1].location.href = url;

 }else {

  setFlipped(true);
  flip();

 }
}  /* zum Indes-Frame wechseln */


function openSub(url) {

 if (url) {

  frames[0].location.href = url;

 }else {

  setFlipped(false);
  flip();

 }
}  /* zum Expo.-Frame wechseln */


var popping;  /* Intervall-Variable */


function pop(d) {

  document.getElementById('work').src = '../v7/btn_work_b.gif';

  with (document.getElementById('sub_menu').style) {

   visibility = 'visible';
   
   var h = Number(height.substr(0, height.length - 2));

   if (h == 0) h = min;

   if (d) {

    if (h < max) {
     height = h + 10;
    } else {
     window.clearInterval(popping);
     height = max;
     document.getElementById('work').src = '../v7/btn_work_c.gif';
    }

   } else {

    if (h > min) {
     height = h - 10;
    } else {
     window.clearInterval(popping);
     height = min;
     visibility = 'hidden';
     document.getElementById('work').src = '../v7/btn_work_a.gif';
    }
   }
  }
  document.getElementById('insub').style.marginTop = h - max;

 }  /* Sub-Menü Up/Down */


 function smenu(d) {

   window.clearInterval(popping);
   popping = window.setInterval('pop(' + d + ');', 10);

 }  /* Sub-Menü Up-/Down-Poppen */


 var last;     /* letzter Button */
 var sub_now;  /* aktueller Sub-Button */ 
 var sub_last; /* letzter Sub-Button */


 function setNow(now) {

  sub_now = now.substr(5);
  now = now.substr(0, 4);

  if (sub_last && sub_last != sub_now)
   document.getElementById(sub_last).src = '../v7/sub_' + sub_last + '_a.gif';

  if (now == 'work') {
   smenu(1);
   if (sub_now) {
    document.getElementById(sub_now).src = '../v7/sub_' + sub_now + '_c.gif';
    sub_last = sub_now;
   } else {
    sub_last = '';
   }
  } else {
   smenu(0);
   sub_last = '';
  }

  var suffix = (last == 'work') ? 'b' : 'a';

  if (now != last) {
   document.getElementById(now).src = '../v7/btn_' + now + '_c.gif';
   if (last)
    document.getElementById(last).src = '../v7/btn_' + last + '_' + suffix + '.gif';
   last = now;
  }
 }  /* Button (und Sub-Button) setzen */