//------------------------------------------------------------------------------
// Variables
//------------------------------------------------------------------------------

var menuTop = 0;
var menuLeft = 0;

var domSMenu = null;
var oldDomSMenu = null;
var t = 0;
var lDelay = 3;
var lCount = 0;
var pause = 100;

var browserName = navigator.appName;
var browserVersion = parseInt(navigator.appVersion);

//document.writeln(browserName);
//document.writeln(browserVersion);

//------------------------------------------------------------------------------
// Pop Menus
//------------------------------------------------------------------------------

function popMenu(menuNum){
   if (isDHTML) {
      ///// Sets the previous menu's visibility to hidden
      t = 2;
      if (oldDomSMenu) {
         oldDomSMenu.visibility = 'hidden'; 
         oldDomSMenu.zIndex = '0'; 
         t = 2; 
         lCount = 0;
      }

      ///// Defines the DOMs of the menu objects
      var idMenu = 'menuHead';
      var domMenu = findDOM(idMenu,0);

      var idMenuOpt = 'menuHead' + menuNum;
      var domMenuOpt = findDOM(idMenuOpt,0);      

      var idSMenu = 'menu' + menuNum;
      var domSMenu = findDOM(idSMenu,1);

      ///// Defines the positions of the sub-menus
      if (isID || isAll) {    
         var offset = 30;
         if (browserName.indexOf('Netscape') == -1)
            offset = 240;
         if ((browserName.indexOf('Netscape') == 0) && (browserVersion == 5))
            offset = 0;
         menuLeft = (domMenu.offsetLeft) + (domMenuOpt.offsetLeft) - offset;
         menuTop = (domMenu.offsetTop) + (domMenu.offsetHeight) + 25;
      }
      if (isLayers) {
         menuLeft = document.layers[idMenu].layers[idMenuOpt].pageX - 30;
         menuTop = domMenu.pageY + domMenu.clip.height - 5;
      }

      ///// Positions and shows the menu
      if (oldDomSMenu != domSMenu) {   
         domSMenu.left = menuLeft; 
         domSMenu.top = menuTop;
         domSMenu.visibility = 'visible';
         domSMenu.zIndex = '100';
         oldDomSMenu = domSMenu;
      }

      ///// Resets oldDom if it is the same as the current DOM
      else {
         oldDomSMenu = null;
      }
   }

   ////// Returns a 'null' value for non-DHTML Browsers 
   else {
      return null;
   }
}

function delayHide() {
   ///// Checks to see if there is a menu showing and whether 
   ///// the global variable 't' has been set to 0
   if ((oldDomSMenu) && (t == 0)) {
      ///// Hides the old menu, resets menu conditions, 
      ///// and stops the function running
      oldDomSMenu.visibility = 'hidden'; 
      oldDomSMenu.zIndex = '0';
      oldDomSMenu = null;
      lCount = 0; 
      return false;
   }

   ///// Interupts the function if another menu is opened
   if (t == 2) {
      lCount = 0;
      return false;
   }

   ///// Repeats the function adding 1 to lCount each time until 
   ///// lCount is equal to lDelay and then sets 't' to 0 so that 
   ///// the menu will hide when it runs again
   if (t == 1) { 
      lCount = lCount + 1;
      if (lDelay <= lCount) {
         t = 0;
      }
      if (lDelay >= lCount) {
         setTimeout('delayHide(' + t + ')',pause);
      }
   }
}
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