//do browser detect stuff
var isNS = (navigator.appName == "Netscape");
var isMacIE = ( (navigator.userAgent.indexOf("IE 4")  > -1) && (navigator.userAgent.indexOf("Mac")  > -1) );
var layerRef = (isNS) ? "document" : "document.all";
var styleRef = (isNS) ? "" : ".style";
var isDynamic = ( (document.layers || document.all) && !isMacIE );

var activeMenu = 0;


function activateMenu(menuLayerRef,horiz,haut) {
        
        if (isDynamic && activeMenu != menuLayerRef) {

                if (activeMenu) hideMenu("menu" + activeMenu);
                        
                menuID = "menu" + menuLayerRef;
                activeMenu = menuLayerRef;
        
                if (isNS) {
                        document[menuID].top = haut;
                        document[menuID].right = horiz;
                } else {
                        document.all[menuID].style.pixelTop = haut;
                        document.all[menuID].style.pixelright = horiz;
                }

                showMenu(menuID)
        }
}

function showMenu(layerID) {
        eval(layerRef + '["' + layerID + '"]' + styleRef + '.visibility = "visible"');
}

function hideMenu(layerID) {
        eval(layerRef + '["' + layerID + '"]' + styleRef + '.visibility = "hidden"');
}

function killMenu(e) {
        //check if theres a menu active
        if (activeMenu) {
                menuID = "menu" + activeMenu;
                hideMenu(menuID);
                activeMenu = 0;
        }  

}

function init() {
        if (isDynamic) {
                if (isNS) {document.captureEvents(Event.MOUSEUP);} 
                document.onmouseup = killMenu;
        }
}