useTimeouts = 1;
timeoutLength = 1000;  // time in ms; not significant if useTimeouts = 0;
shutdownOnClick = 0;
loaded = 0;
layersMoved = 0;
layerPoppedUp = '';
timeoutFlag = 0;
if (Opera56 || IE4) {
  useTimeouts = 0;
}
if (NS4 || Opera56 || IE4) {
  shutdownOnClick = 1;
}
currentY = 0;
function grabMouse(e) {
  currentY = e.pageY;
}
if (NS4) {
  document.captureEvents(Event.MOUSEDOWN | Event.MOUSEMOVE);
  document.onmousemove = grabMouse;
}

function seeThroughElements(show) {
  if (show) {
    foobar = 'visible';
  } else {
    foobar = 'hidden';
  }
  for (i=0; i<toBeHidden.length; i++) {
    toBeHidden[i].style.visibility = foobar;
  }
}

function shutdown() {
  for (i=0; i<numl; i++) {
    LMPopUpL(listl[i], false);
  }
  layerPoppedUp = '';
  if (Konqueror || IE5) {
    seeThroughElements(true);
  }
}
if (shutdownOnClick) {
  if (NS4) {
    document.onmousedown = shutdown;
  } else {
    document.onclick = shutdown;
  }
}

function setLMTO() {
  if (useTimeouts) {
    timeoutFlag = setTimeout('shutdown()', timeoutLength);
  }
}

function clearLMTO()
{
  if (useTimeouts) {
    clearTimeout(timeoutFlag);
  }
}

function moveLayerX(menuName) {
  if (!loaded || (isVisible(menuName) && menuName != layerPoppedUp)) {
    return;
  }
  if (father[menuName] != '') {
    if (!Opera5 && !IE4) {
      width0 = lwidth[father[menuName]];
      width1 = lwidth[menuName];
    } else if (Opera5) {
      // Opera 5 stupidly and exaggeratedly overestimates layers widths
      // hence we consider a default value equal to $abscissaStep
      width0 = abscissaStep;
      width1 = abscissaStep;
    } else if (IE4) {
      width0 = getOffsetWidth(father[menuName]);
      width1 = getOffsetWidth(menuName);
    }
    onLeft = getOffsetLeft(father[menuName]) - width1 + menuLeftShift;
    onRight = getOffsetLeft(father[menuName]) + width0 - menuRightShift;
    windowWidth = getWindowWidth();
    windowXOffset = getWindowXOffset();
    if (onLeft < windowXOffset && onRight + width1 > windowWidth + windowXOffset) {
      if (onRight + width1 - windowWidth - windowXOffset > windowXOffset - onLeft) {
        onLeft = windowXOffset;
      } else {
        onRight = windowWidth + windowXOffset - width1;
      }
    }
    if (back[father[menuName]]) {
      if (onLeft < windowXOffset) {
        back[menuName] = 0;
      } else {
        back[menuName] = 1;
      }
    } else {
      if (onRight + width1 > windowWidth + windowXOffset) {
        back[menuName] = 1;
      } else {
        back[menuName] = 0;
      }
    }
    if (back[menuName]) {
      setLeft(menuName, onLeft);
    } else {
      setLeft(menuName, onRight);
    }
  }
  moveLayerY(menuName);  // workaround needed for Mozilla < 1.4 for MS Windows
}

function moveLayerY(menuName) {
  if (!loaded || (isVisible(menuName) && menuName != layerPoppedUp)) {
    return;
  }
  if (!layersMoved) {
    moveLayers();
    layersMoved = 1;
  }
  if (!NS4) {
    newY = getOffsetTop('ref' + menuName);
  } else {
    newY = currentY;
  }
  newY += menuTopShift;
  layerHeight = getOffsetHeight(menuName);
  windowHeight = getWindowHeight();
  windowYOffset = getWindowYOffset();
  if (newY + layerHeight > windowHeight + windowYOffset) {
    if (layerHeight > windowHeight) {
      newY = windowYOffset;
    } else {
      newY = windowHeight + windowYOffset - layerHeight;
    }
  }
  if (Math.abs(getOffsetTop(menuName) - newY) > thresholdY) {
    setTop(menuName, newY);
  }
}

function moveLayerX1(menuName, father) {
  if (!lwidthDetected) {
    return;
  }
  if (!Opera5 && !IE4) {
    width1 = lwidth[menuName];
  } else if (Opera5) {
    // Opera 5 stupidly and exaggeratedly overestimates layers widths
    // hence we consider a default value equal to $abscissaStep
    width1 = abscissaStep;
  }
  foobar = getOffsetLeft(father + menuName);
  if (!IE4) {
    windowWidth = getWindowWidth();
    windowXOffset = getWindowXOffset();
    if (foobar + width1 > windowWidth + windowXOffset) {
      foobar = windowWidth + windowXOffset - width1;
    }
    if (foobar < windowXOffset) {
      foobar = windowXOffset;
    }
  }
  setLeft(menuName, foobar);
}

function layersOverlap(layer, i) {
  if (Konqueror22) {
    return true;
  }
//  xa1 = getOffsetLeft(layer);
//setLeft(layer, xa1);
  xa1 = layerLeft[layer];
  xa2 = xa1 + getOffsetWidth(layer);
//setWidth(layer, xa2-xa1);
//  ya1 = getOffsetTop(layer);
//setTop(layer, ya1);
  ya1 = layerTop[layer];
  ya2 = ya1 + getOffsetHeight(layer);
//setHeight(layer, ya2-ya1);
//alert(':' + xa1 + ':' + xa2 + ':' + ya1 + ':' + ya2 + ':');
  xb1 = toBeHiddenLeft[i];
  xb2 = xb1 + toBeHidden[i].offsetWidth;
  yb1 = toBeHiddenTop[i];
  yb2 = yb1 + toBeHidden[i].offsetHeight;
//alert(':' + xb1 + ':' + xb2 + ':' + yb1 + ':' + yb2 + ':');
  if(xb1>xa1) xa1=xb1; if(xb2<xa2) xa2=xb2;
  if(yb1>ya1) ya1=yb1; if(yb2<ya2) ya2=yb2;
  return (xa2>xa1 && ya2>ya1);
}

function seeThroughWorkaround(menuName, on) {
  for (i=0; i<toBeHidden.length; i++) {
    if (layersOverlap(menuName, i)) {
      if (on) {
        toBeHidden[i].style.visibility = 'hidden';
      } else {
        toBeHidden[i].style.visibility = 'visible';
      }
    }
  }
}

function LMPopUpL(menuName, on) {
  if (!loaded) {
    return;
  }
  if (!layersMoved) {
    moveLayers();
    layersMoved = 1;
  }
  setVisibility(menuName, on);
}

function LMPopUp(menuName, isCurrent) {
  if (!loaded || menuName == layerPoppedUp || (isVisible(menuName) && !isCurrent)) {
    return;
  }
  if (menuName == father[layerPoppedUp]) {
    LMPopUpL(layerPoppedUp, false);
//    seeThroughWorkaround(menuName, false);
  } else if (father[menuName] == layerPoppedUp) {
    LMPopUpL(menuName, true);
    seeThroughWorkaround(menuName, true);
  } else {
    shutdown();
    foobar = menuName;
    do {
      LMPopUpL(foobar, true);
      seeThroughWorkaround(foobar, true);
      foobar = father[foobar];
    } while (foobar != '')
  }
  layerPoppedUp = menuName;
}

function resizeHandler() {
  if (NS4) {
    window.location.reload();
  }
  shutdown();
  for (i=0; i<numl; i++) {
    setLeft(listl[i], 0);
    setTop(listl[i], 0);
  }
  if (toBeHidden != null && toBeHidden.length > 0) {
    seeThroughCoordinatesDetection();
  }
  layersMoved = 0;
}
window.onresize = resizeHandler;

function yaresizeHandler() {
  if (window.innerWidth != origWidth || window.innerHeight != origHeight) {
    if (Konqueror22 || Opera5) {
      window.location.reload();  // Opera 5 often fails this
    }
    origWidth  = window.innerWidth;
    origHeight = window.innerHeight;
    resizeHandler();
  }
  setTimeout('yaresizeHandler()', 500);
}

function loadHandler() {
  if (Konqueror22 || Opera56) {
    origWidth  = window.innerWidth;
    origHeight = window.innerHeight;
    yaresizeHandler();
  }
}
window.onload = loadHandler;

function fixieflm(menuName) {
  if (DOM) {
    setWidth(menuName, '100%');
  } else {  // IE4 IS SIMPLY A BASTARD !!!
    document.write('</div>');
    document.write('<div id="IE4' + menuName + '" style="position: relative; width: 100%; visibility: visible;">');
  }
}