var delay        = 500; /////
var menuElement  = new Array ();
var usedWidth    = 0;
var numOfMenus   = 0;



isNC    = (document.layers) ? 1 : 0;
isOPERA = (navigator.userAgent.indexOf('Opera') >= 0)? true : false;
isIE    = (document.all && !isOPERA)? true : false;
isDOM   = (document.getElementById && !isIE && !isOPERA)? true : false;

var topID  = -1;


function menuConstructor (id, content)
{
 this.ID            = id;
 this.parentID      = content [0]*1;
 this.parentItemID  = content [1]*1;
 this.width         = content [2]*1;
 this.timerID       = -1;
 this.isOn          = false;
 this.item          = new Array ();
 this.currItemID    = -1;
 
 this.x = content [3]*1;
 
 if (this.x < 0 && this.parentID == -1)
 {
  this.x = initX + usedWidth;
  usedWidth = usedWidth + this.width;
 }
 else if (this.x < 0 && this.parentID > -1)
 {
  this.x =  menuElement [this.parentID].x
         + menuElement [this.parentID].width
         - xOverlap;
 }
 
 this.y = content [4]*1;
 if (this.y < 0 && this.parentID == -1)
  this.y = initY;
 else if (this.y < 0 && this.parentID > -1)
  this.y =  menuElement [this.parentID].y
          + itemHeight*this.parentItemID
         + yOverlap;
 
 items = content [5];

 layerBody = '<table width=' + this.width + ' cellpadding=3 cellspacing=' + borderSize + ' border=0>';
 
 for (j = 0; j <= items.length - 2; j = j + 2)
 {
  controlBlock = ' onMouseOver = "enterItem (' + this.ID + ', ' + ((j + 2)/2 - 1) + ');" onMouseOut = "exitItem (' + this.ID + ', ' + ((j + 2)/2 - 1) + ');" ';
  layerBody += '<td height=' + itemHeight + ' width=' + this.width + ' bgcolor=' + backColor + '><a class=subMenu href='+ items [j + 1] +' ' + controlBlock + '>' + items [j] + '</a></td>';
  if (j < items.length - 2)
   layerBody = layerBody +  '<tr>\n';
  else
   layerBody = layerBody + '\n';
 }

 if (!isNC)
  layerHeader = '<div id=Menu' + this.ID +
           ' onMouseOver="enterMenu (' + this.ID + ');" onMouseOut = "exitMenu (' + this.ID + ');"' +
              ' style="background: ; width: ' + this.width + '; visibility: hidden; position: absolute; left: ' + this.x +
              '; top: ' + this.y + ';">';
 else
  layerHeader = '<layer id=Menu' + this.ID +
        ' onMouseOver="enterMenu (' + this.ID + ');" onMouseOut = "exitMenu (' + this.ID + ');"' +
        ' visibility=hide left=' + this.x +
        ' top =' + this.y + '>';

 layerHeader += '<table width=' + this.width + ' cellpadding=0 cellspacing=0 border=0>' +
        '<td bgcolor=' + borderColor + '>';

 layerFooter = '</table></td></table>';

 if (!isNC)
  layerFooter = layerFooter + '</div>';
 else
  layerFooter = layerFooter + '</layer>';

 document.writeln (layerHeader + layerBody + layerFooter);

 return this;
}
function enterTopItem (ID)
{
 if (topID != ID && topID != -1)
  hideTree (topID);
 releaseTree (ID);
 topID = ID;
 show (ID);
}
function exitTopItem (ID)
{
 menuElement [ID].timerID = setTimeout ('hide (' + ID + ')', delay);
}
function enterItem (menuID, itemID)
{
 var currItemID = menuElement [menuID].currItemID;

 if (currItemID != i & currItemID > -1) 
  hide (currItemID);
 

 for (var i = 0; i < numOfMenus; i++)
 {
  if (menuElement [i].parentID == menuID &&
      menuElement [i].parentItemID == itemID)
  {
   clearTimeout (menuElement [i].timerID);
   menuElement [i].timerID = -1;
   show (i);
   return 0;
  }
 }

 return -1;
}
function exitItem (menuID, itemID)
{
 for (var i = 0; i < numOfMenus; i++)
 {
  if (menuElement [i].parentID == menuID &&
      menuElement [i].parentItemID == itemID)
  {
   menuElement [i].timerID = setTimeout ('hide (' + i + ')', delay);
   return 0;
  }
 }
}
function enterMenu (ID)
{
 var parentID = menuElement [ID].parentID;
 if (parentID == -1)
 {
  clearTimeout (menuElement [ID].timerID);
  menuElement [ID].timerID = -1;
 }
 else
  releaseTree (ID);
}
function exitMenu (ID)
{
 timeoutTree (ID);
}
function hideTree (ID)
{
 hide (ID);
 for (var j = 0; j < numOfMenus; j++)
 {
  if (menuElement [j].parentID == ID &&
   menuElement [j].isOn)
  {
   hideTree (j);
   return 0;
  }
 }
}
function releaseTree (ID)
{
 clearTimeout (menuElement [ID].timerID);
 menuElement [ID].timerID = -1;

 var parentID = menuElement [ID].parentID;
 if (parentID > -1)
  releaseTree (parentID);
}
function timeoutTree (ID)
{
 menuElement [ID].timerID = setTimeout ('hide (' + ID + ')', delay);
 var parentID = menuElement [ID].parentID;
 if (parentID > -1)
  timeoutTree (parentID);
}

function show (ID)
{
 if (isDOM) 
  document.getElementById('Menu' + ID).style.visibility = "visible";
     else if (isIE) 
  document.all['Menu' + ID].style.visibility = "visible";
       else if (isNC) 
  document.layers[ID].visibility = "show";  

 menuElement [ID].isOn = true;

 if (menuElement [ID].parentID > -1)
  menuElement [menuElement [ID].parentID].currItemID = ID;
}

function hide (ID)
{
 if (isDOM) 
  document.getElementById('Menu' + ID).style.visibility = "hidden";
     else if (isIE) 
  document.all['Menu' + ID].style.visibility = "hidden";
       else if (isNC) 
  document.layers[ID].visibility = "hide";

 menuElement [ID].isOn = false;

 if (menuElement [ID].parentID > -1)
  menuElement [menuElement [ID].parentID].currItemID = -1;
}

function createMenuTree ()
{
 for (var i = 0; i < menuContent.length; i++)
 {
  menuElement [i] = new menuConstructor (i, menuContent [i]);
  numOfMenus++;
 }
}

createMenuTree ();