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.layers['testmenu']) || (document.all && document.all['testmenu'])) && !isMacIE );
var activeMenu = 0;


function activateMenu(menuLayerRef, offset) {
   if (isDynamic && activeMenu != menuLayerRef) {
      if (activeMenu) hideMenu("menu" + activeMenu); 
      menuID = "menu" + menuLayerRef;
      activeMenu = menuLayerRef;
      if (isNS) {
         document[menuID].top = offset;
         document[menuID].left = 400;
      } else {
         document.all[menuID].style.pixelTop = offset;
         document.all[menuID].style.pixelLeft = 400;
      }
   showMenu(menuID)
   }
}



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



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



// check if there's a menu active
function turnOff() {
   if (activeMenu) {
      menuID = "menu" + activeMenu;
      hideMenu(menuID);
      activeMenu = 0;
   }
}



// kills menu on clickup
function init() {
   if (isDynamic) {
      if (isNS) {
         document.captureEvents(Event.MOUSEUP);
      }
      document.onmouseup = turnOff;
   }
}



// this function needs to be called from the sub menus DIV
function hideMe() {
   if (activeMenu) {
      menuID = "menu" + activeMenu;
      hideMenu(menuID);
      activeMenu = 0;
   }
}



// Work-around Netscape resize bug
if (isDynamic && isNS) {
   origWidth = innerWidth;
   origHeight = innerHeight;
}

function reDo() {
   if (innerWidth != origWidth || innerHeight != origHeight) {
      location.reload();
   }
}
   if (isDynamic && isNS) {
      onresize = reDo;
   }