useTimeouts = 1;
timeoutLength = 500;        // time in ms; not significant if useTimeouts = 0;
shutdownOnClick = 0;

menuLeftShift = 6;
menuRightShift = 10;

loaded = 0;
layersMoved = 0;
layerPoppedUp = "";

timeoutFlag = 0;
if (Konqueror21 || Opera56 || IE4) {
        useTimeouts = 0;
}
if (NS4 || Opera56 || IE4) {
        shutdownOnClick = 1;
}

currentY = 0;
function grabMouse(e) {        // for NS4
        currentY = e.pageY;
}
if (NS4) {
        document.captureEvents(Event.MOUSEDOWN | Event.MOUSEMOVE);
        document.onmousemove = grabMouse;
}

function shutdown() {
        for (i=1; i<=numl; i++) {
                LMPopUpL(listl[i], false);
        }
        layerPoppedUp = "";
}
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 (NS4 && !DOM) {
//                        windowXOffset = 0;
//                }
                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 {
//alert(onRight + " - " + width1 + " - " +  windowWidth + " - " + windowXOffset);
                        if (onRight + width1 > windowWidth + windowXOffset) {
                                back[menuName] = 1;
                        } else {
                                back[menuName] = 0;
                        }
                }
                if (back[menuName]) {
                        setLeft(menuName, onLeft);
                } else {
                        setLeft(menuName, onRight);
                }
        }
}

function moveLayerY(menuName, ordinateMargin) {
        if (!loaded || (isVisible(menuName) && menuName != layerPoppedUp)) {
                return;
        }
        if (!layersMoved) {
                moveLayers();
                layersMoved = 1;
        }
        if (!NS4) {
                newY = getOffsetTop("ref" + menuName);
        } else {
                newY = currentY;
        }
        newY -= ordinateMargin;
        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);
        }
        moveLayerX(menuName);        // workaround needed for Mozilla < 1.4 for MS Windows
}

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);
        } else if (father[menuName] == layerPoppedUp) {
                LMPopUpL(menuName, true);
        } else {
                shutdown();
                foobar = menuName;
                do {
                        LMPopUpL(foobar, true);
                        foobar = father[foobar];
                } while (foobar != "")
        }
        layerPoppedUp = menuName;
}

function resizeHandler() {
        if (NS4) {
                window.location.reload();
        }
        shutdown();
        for (i=1; i<=numl; i++) {
                setLeft(listl[i], 0);
                setTop(listl[i], 0);
        }
//        moveLayers();
        layersMoved = 0;
}
window.onresize = resizeHandler;

function yaresizeHandler() {
        if (window.innerWidth != origWidth || window.innerHeight != origHeight) {
                if (Konqueror2 || Opera5) {
                        window.location.reload();        // Opera 5 often fails this
                }
                origWidth  = window.innerWidth;
                origHeight = window.innerHeight;
                resizeHandler();
        }
        setTimeout('yaresizeHandler()', 500);
}
function loadHandler() {
        if (Konqueror2 || 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;\">");
        }
}