// +------------------------------------------------------------+
// | yx_menu                         Version 7                  |
// | Copyright 1999  Xin Yang        yangxin@iname.com          |
// | Created 11/18/1999              Last Modified 04/11/2000   |
// | Web Site:                       http://yx.webprovider.com  |
// +------------------------------------------------------------+
// | Copyright 1999,2000  Xin Yang   All Rights Reserved.       |
// +------------------------------------------------------------+
// | For personal purpose, send me your URL and put a link back |
// | to my web site, then you can use this script free.         |
// |                                                            |
// | For commercial purpose, obtain quotation for referencing,  |
// | using, hosting, selling or distributing this script.       |
// |                                                            |
// | In all cases copyright must remain intact.                 |
// +------------------------------------------------------------+

// Script begins

var isIE4 = false;
var isNN4 = false;

var flagMenu = "M";
var flagLink = "L";
var flagInfo = "I";
var flagCommand = "C";
var flagSeparator = "S";

var charWidth = 6; // character width
var charHeight = 15; // character height
var colorNormal = "#993300"; // menu pad color
var colorHighlighted = "#E6821C"; // menu highlighted item color
var colorTopLine = "#999999"; // separator upper line color
var colorBottomLine = "#ffffff"; // separator lower line color

var colorContent = "#fffff0"; // content box background color
var colorBorder = "#777777"; // content box border color
var contentPadding = 5; // content box padding

var borderSize = 1;
var marginSize = 4;
var marginString = "  ";
var subMenuFlagSize = 4;

var menuShown = -1;
var itemOn = false;
var nnWidth = 0, nnHeight = 0;

var menuItemCount = -1;
var menuItem = new Array();
var menuFolderCount = -1;
var menuFolder = new Array();
var menuFolderSwitch = new Array();
var menuWidth = new Array();
var itemLayer = new Array();
var menuLayer = new Array();

var mouseX = 0;
var mouseY = 0;

var contentSwitch = 0;
var contentID = "Content";
var contentShown = false;

function launchPage(pageURL) {
  document.location.assign(pageURL);
  
}

function launchCommand(commandString) {
  //eval(commandString);
  alert(commandString);
}

function clickMenu(menuNum,itemIndex) {
  var menuIndex = menuItem[menuNum][itemIndex].myFolder;
  var folderIndex = menuItem[menuNum][itemIndex].folder;
  var itemX = menuItem[menuNum][itemIndex].x;
  var itemY = menuItem[menuNum][itemIndex].y;
  var menuX = itemX + menuWidth[menuNum][menuIndex] * charWidth + subMenuFlagSize;

  if (menuItem[menuNum][itemIndex].type == flagMenu) {
    if (menuFolderSwitch[menuNum][folderIndex])
      hideMenu(menuNum,folderIndex)
    else
      showMenu(menuNum,folderIndex,menuX,itemY);
  }
  else if (menuItem[menuNum][itemIndex].type == flagInfo) {
    if (contentShown)
      hideContent()
    else
      showContent(menuNum,itemIndex,menuX,itemY);
  }
  else if (menuItem[menuNum][itemIndex].type == flagLink) {
    closeMenu(menuNum);
    launchPage(menuItem[menuNum][itemIndex].url);
  }
  else if (menuItem[menuNum][itemIndex].type == flagCommand) {
    closeMenu(menuNum);
    launchCommand(menuItem[menuNum][itemIndex].command);
  }
}

function hideContent() {
  var contentxID = contentID + (1 - contentSwitch) + "";

  hideLayer(contentxID);
  contentShown = false;
}

function showContent(menuNum,itemIndex,menuX,menuY) {
  var menuIndex = menuItem[menuNum][itemIndex].myFolder;
  var contentImage = '<img src="a_pixel.gif" width=1 height=1 border=0>';
  var borderLine = '<tr><td bgcolor=' + colorBorder + ' colspan=3 height=' + borderSize + '>' + contentImage + '</td></tr>';
  var contentString = '<table align=center cellpadding=0 cellspacing=0 border=0>' + borderLine + '<tr><td bgcolor=' + colorBorder + ' width=' + borderSize + '>' + contentImage + '</td><td align=center valign=top><table bgcolor=' + colorContent + ' width=' + menuItem[menuNum][itemIndex].width + ' align=center cellpadding=' + contentPadding + ' cellspacing=0 border=0><tr align=left valign=top><td><span id="contentText">' + menuItem[menuNum][itemIndex].description + '</span></td></tr></table></td><td bgcolor=' + colorBorder + ' width=' + borderSize + '>' + contentImage + '</td></tr>' + borderLine + '</table>';
  var content0ID = contentID + (1 - contentSwitch) + "";
  var content1ID = contentID + contentSwitch + "";

  contentSwitch = 1 - contentSwitch;
  contentShown = true;

  if (isIE4) {
    document.all[content1ID].innerHTML = contentString;
    document.all[content1ID].style.zIndex = menuIndex * 2 + 2;
  }
  else {
    document.layers[content1ID].document.open();
    document.layers[content1ID].document.writeln(contentString);
    document.layers[content1ID].document.close();
    document.layers[content1ID].zIndex = menuIndex * 2 + 2;
  }

  moveLayerTo(content1ID,menuX,menuY);
  showLayer(content1ID);
  hideLayer(content0ID);
}

function mouseOver() {
  var menuNum = this.menuNum;
  var itemIndex = this.itemIndex;
  var menuIndex = menuItem[menuNum][itemIndex].myFolder;
  var menuLength = menuFolder[menuNum][menuIndex].length;
  var folderIndex = menuItem[menuNum][itemIndex].folder;
  var itemX = menuItem[menuNum][itemIndex].x;
  var itemY = menuItem[menuNum][itemIndex].y;
  var thisFolder = 0;
  var thisItem = 0;
  var menuX = itemX + menuWidth[menuNum][menuIndex] * charWidth + subMenuFlagSize;

  itemOn = true;

  if (menuItem[menuNum][itemIndex].type != flagSeparator) {
    if (isIE4) {
      this.style.backgroundColor = colorHighlighted;
    }
    else {
      this.document.bgColor = colorHighlighted;
    }
  }

  for (var i = 0; i < menuLength; i++) {
    thisItem = menuFolder[menuNum][menuIndex][i];
    
    if (thisItem != itemIndex)
      if (menuItem[menuNum][thisItem].type == flagMenu) {
        thisFolder = menuItem[menuNum][thisItem].folder;

        if (menuFolderSwitch[menuNum][thisFolder])
          hideMenu(menuNum,thisFolder);
      }
  }

  if (menuItem[menuNum][itemIndex].type == flagMenu) {
    hideContent();

    if (!menuFolderSwitch[menuNum][folderIndex])
      showMenu(menuNum,folderIndex,menuX,itemY);
  }
  else if (menuItem[menuNum][itemIndex].type == flagInfo) {
    if (contentShown)
      showContent(menuNum,itemIndex,menuX,itemY);
  }
  else
    hideContent();

  if (menuItem[menuNum][itemIndex].type != flagInfo)
    window.status = menuItem[menuNum][itemIndex].description;
  return true;
}

function mouseOut() {
  itemOn = false;

  if (isIE4)
    this.style.backgroundColor = colorNormal
  else
    this.document.bgColor = colorNormal;

  window.status = "";
  return true;
}

function menuItemUnit() {
  this.type = "";
  this.name = "";
  this.description = "";
  this.width = "";
  this.url = "";
  this.command = "";
  this.menu = "";
  this.folder = -1;
  this.myFolder = -1;
  this.x = -1;
  this.y = -1;
}

function readMenu(menuNum,menuName) {
  var menu = eval(menuName);
  var menuLength = menu.length
  var thisFolder = ++menuFolderCount;

  menuFolder[menuNum][thisFolder] = new Array();
  menuFolderSwitch[menuNum][thisFolder] = false;
  menuWidth[menuNum][thisFolder] = 0;
  menuLayer[menuNum][thisFolder] = false;

  for (var i = 0; i < menuLength; i++) {
    menuFolder[menuNum][thisFolder][i] = ++menuItemCount;
    itemLayer[menuNum][menuItemCount] = false;

    menuItem[menuNum][menuItemCount] = new menuItemUnit();
    menuItem[menuNum][menuItemCount].myFolder = thisFolder;
    menuItem[menuNum][menuItemCount].type = menu[i][0];
    menuItem[menuNum][menuItemCount].name = menu[i][1];
    menuItem[menuNum][menuItemCount].description = menu[i][2];

    if (menuWidth[menuNum][thisFolder] < (menuItem[menuNum][menuItemCount].name.length + marginSize))
      menuWidth[menuNum][thisFolder] = menuItem[menuNum][menuItemCount].name.length + marginSize;

    if (menuItem[menuNum][menuItemCount].type == flagMenu) {
      menuItem[menuNum][menuItemCount].menu = menu[i][3];
      menuItem[menuNum][menuItemCount].folder = menuFolderCount + 1;
      readMenu(menuNum,menuItem[menuNum][menuItemCount].menu);
    }
    else if (menuItem[menuNum][menuItemCount].type == flagInfo) {
      menuItem[menuNum][menuItemCount].width = parseInt(menu[i][3]);
    }
    else if (menuItem[menuNum][menuItemCount].type == flagLink) {
      menuItem[menuNum][menuItemCount].url = menu[i][3];
    }
    else if (menuItem[menuNum][menuItemCount].type == flagCommand) {
      menuItem[menuNum][menuItemCount].command = menu[i][3];
    }
    else if (menuItem[menuNum][menuItemCount].type != flagSeparator) {
      alert("Error found in " + menuName);
    }
  }
}

function getItem(menuNum,itemIndex,itemDimX,itemDimY,menuIndex) {
  var thisItem = null;
  var subMenuFlag = (menuItem[menuNum][itemIndex].type == flagMenu)?"subMenu.gif":"onePixel.gif";
  var singleQuote = "'";
  var itemID = "m" + menuNum + "i" + itemIndex + "";
  var layerString = '<div id="' + itemID + '" style="position:absolute; width:' + itemDimX + '; background-color:' + colorNormal + '; visibility:hidden;"></div>';
  var htmlString = (menuItem[menuNum][itemIndex].type == flagSeparator)?('<table width=' + itemDimX +' height=2 cellpadding=0 cellspacing=0 border=0><tr align=left valign=bottom><td bgcolor=' + colorTopLine + '><img src="onePixel.gif" width=1 height=1 border=0></td></tr><tr align=left valign=top><td bgcolor=' + colorBottomLine + '><img src="onePixel.gif" width=1 height=1 border=0></td></tr></table>'):('<table width=' + itemDimX +' height=' + itemDimY + ' cellpadding=0 cellspacing=0 border=0><tr align=left valign=middle><td nowrap><span id="menuText"><a class="menu" href="javascript:clickMenu(' + menuNum + ',' + itemIndex + ')" onMouseOver="window.status=' + singleQuote + (menuItem[menuNum][itemIndex].type == flagInfo?'':menuItem[menuNum][itemIndex].description) + singleQuote + ';return true;">' + marginString + menuItem[menuNum][itemIndex].name + marginString + '</a></span></td><td><img src="' + subMenuFlag + '" width=4 height=7 border=0 align=right></td></tr></table>');

  if (!itemLayer[menuNum][itemIndex]) {
    itemLayer[menuNum][itemIndex] = true;

    if (isIE4) {
      document.body.insertAdjacentHTML("BeforeEnd",layerString);
      thisItem = document.all[itemID];

      thisItem.innerHTML = htmlString;
      thisItem.style.zIndex = menuIndex * 2 + 1;

      thisItem.onmouseover = mouseOver;
      if (menuItem[menuNum][itemIndex].type != flagSeparator)
        thisItem.onmouseout = mouseOut;
    }
    else {
      document.layers[itemID] = new Layer(itemDimX);
      thisItem = document.layers[itemID];

      thisItem.visibility = "hidden";
      thisItem.document.open();
      thisItem.document.writeln(htmlString);
      thisItem.document.close();
      thisItem.document.bgColor = colorNormal;
      thisItem.zIndex = menuIndex * 2 + 1;

      thisItem.onmouseover = mouseOver;
      if (menuItem[menuNum][itemIndex].type != flagSeparator)
        thisItem.onmouseout = mouseOut;
    }

    thisItem.itemIndex = itemIndex;
    thisItem.menuNum = menuNum;
  }
  
  return itemID;
}

function getMenu(menuNum,menuIndex,menuDimX,menuDimY) {
  var menuID = "m" + menuNum + "f" + menuIndex + "";
  var menuPadX = menuDimX + borderSize * 2;
  var menuPadY = menuDimY + borderSize * 2;
  var layerString = '<div id="' + menuID + '" style="position:absolute; width:' + menuPadX + '; visibility:hidden;"></div>';
  var htmlString = '<table width=' + menuPadX +' height=' + menuPadY + ' cellpadding=0 cellspacing=0 border=' + borderSize + '><tr align=left valign=middle><td></td></tr></table>';

  if (!menuLayer[menuNum][menuIndex]) {
    menuLayer[menuNum][menuIndex] = true;

    if (isIE4) {
      document.body.insertAdjacentHTML("BeforeEnd",layerString);

      document.all[menuID].innerHTML = htmlString;
      document.all[menuID].style.zIndex = menuIndex * 2;
    }
    else {
      document.layers[menuID] = new Layer(menuPadX);

      document.layers[menuID].visibility = "hidden";
      document.layers[menuID].zIndex = menuIndex * 2;
      document.layers[menuID].document.open();
      document.layers[menuID].document.writeln(htmlString);
      document.layers[menuID].document.close();
    }
  }
  
  return menuID;
}

function showLayer(layerID) {
  if (isIE4)
    document.all[layerID].style.visibility = "visible"
  else
    document.layers[layerID].visibility = "show";
}

function hideLayer(layerID) {
  if (isIE4)
    document.all[layerID].style.visibility = "hidden"
  else
    document.layers[layerID].visibility = "hidden";
}

function moveLayerTo(layerID,x,y) {
  if (isIE4) {
    document.all[layerID].style.pixelLeft = x;
    document.all[layerID].style.pixelTop = y;
  }
  else {
    document.layers[layerID].left = x;
    document.layers[layerID].top = y;
  }
}

function hideMenu(menuNum,menuIndex) {
  var menuLength = menuFolder[menuNum][menuIndex].length;
  var menuID = getMenu(menuNum,menuIndex,0,0);
  var itemID = "";
  var itemIndex = 0;

  for (var i = 0; i < menuLength; i++) {
    itemIndex = menuFolder[menuNum][menuIndex][i];

    if (menuItem[menuNum][itemIndex].type == flagMenu)
      if (menuFolderSwitch[menuNum][menuItem[menuNum][itemIndex].folder])
        hideMenu(menuNum,menuItem[menuNum][itemIndex].folder);

    itemID = getItem(menuNum,itemIndex,0,0,0);
    hideLayer(itemID);
  }

  hideLayer(menuID);

  menuFolderSwitch[menuNum][menuIndex] = false;
}

function showMenu(menuNum,menuIndex,menuX,menuY) {
  var itemDimY = menuY;
  var menuLength = menuFolder[menuNum][menuIndex].length;
  var menuDimX = menuWidth[menuNum][menuIndex] * charWidth + subMenuFlagSize;
  var menuID = "";
  var itemID = "";
  var itemIndex = 0;

  if (menuShown != -1 && menuShown != menuNum)
    hideMenu(menuShown,0);

  menuShown = menuNum;

  for (var i = 0; i < menuLength; i++) {
    itemIndex = menuFolder[menuNum][menuIndex][i];

    menuItem[menuNum][itemIndex].x = menuX;
    menuItem[menuNum][itemIndex].y = itemDimY;
    itemDimY +=  (menuItem[menuNum][itemIndex].type != flagSeparator)?charHeight:2;

    itemID = getItem(menuNum,itemIndex,menuDimX,charHeight,menuIndex);

    moveLayerTo(itemID,menuItem[menuNum][itemIndex].x,menuItem[menuNum][itemIndex].y);
    //showLayer(itemID);
  }

  menuID = getMenu(menuNum,menuIndex,menuDimX,itemDimY-menuY);
  moveLayerTo(menuID,menuX-borderSize,menuY-borderSize);
  //showLayer(menuID);
  
  for (var i = 0; i < menuLength; i++)
    showLayer(getItem(menuNum,menuFolder[menuNum][menuIndex][i],0,0,0));

  showLayer(menuID);

  menuFolderSwitch[menuNum][menuIndex] = true;
}

function buildContent() {
  var content0ID = contentID + "0";
  var content1ID = contentID + "1";

  if (isIE4) {
    document.body.insertAdjacentHTML("BeforeEnd",'<div id="' + content0ID + '" style="position:absolute; width:1; visible:hidden;">')
    document.body.insertAdjacentHTML("BeforeEnd",'<div id="' + content1ID + '" style="position:absolute; width:1; visible:hidden;">')
  }
  else {
    document.layers[content0ID] = new Layer(1);
    document.layers[content0ID].visibility = "hidden";
    document.layers[content1ID] = new Layer(1);
    document.layers[content1ID].visibility = "hidden";
  }
}

function buildMenu(menuArrayName) {
  isIE4 = document.all;
  isNN4 = document.layers;

  var menuArray = eval(menuArrayName);
  var menuCount = menuArray.length;

  if (isNN4 || isIE4) {
    for (var i = 0; i < menuCount; i++) {
      menuItemCount = -1;
      menuFolderCount = -1;

      menuItem[i] = new Array();
      menuFolder[i] = new Array();
      menuFolderSwitch[i] = new Array();
      menuWidth[i] = new Array();

      itemLayer[i] = new Array();
      menuLayer[i] = new Array();

      readMenu(i,menuArray[i][0]);
    }

    if (isNN4) {
      nnWidth = window.innerWidth;
      nnHeight = window.innerHeight;
      window.onResize = reloadMenu;
    }

    buildContent();
    captureClick();
  }
}

function switchMenu(e) {
  mouseX = (isNN4)?(e.pageX+window.pageXOffset):(event.x+document.body.scrollLeft);
  mouseY = (isNN4)?(e.pageY+window.pageYOffset):(event.y+document.body.scrollTop);

  if (!itemOn)
    if (menuShown != -1)
      closeMenu(menuShown);

  return true;
}

function captureClick() {
  if (isIE4)
    document.onclick = switchMenu;
  else {
    document.onClick = switchMenu;
    document.captureEvents(Event.CLICK);
  }
}

function reloadMenu() {
  if (nnWidth != window.innerWidth || nnHeight != window.innerHeight)
    document.location.reload();
}

function openMenu(menuNum) {
  if (menuShown == menuNum)
    closeMenu(menuNum)
  else
    showMenu(menuNum,0,mouseX+borderSize,mouseY+borderSize);
}

function closeMenu(menuNum) {
  hideContent();
  menuShown = -1;
  hideMenu(menuNum,0);
}

// Script ends