// Globals
var was ;
//var undefined = 'undefined';
var _cmIDCount = 0;
var _cmIDName = 'cmSubMenuID';		// for creating submenu id

var _cmTimeOut = null;			// how long the menu would stay
var _cmCurrentItem = null;		// the current menu item being selected;

var _cmNoAction = new Object ();	// indicate that the item cannot be hovered.
var _cmSplit = new Object ();		// indicate that the item is a menu split

// default node properties
var _cmNodeProperties =
{
  	// main menu display attributes
  	//
  	// Note.  When the menu bar is horizontal,
  	// mainFolderLeft and mainFolderRight are
  	// put in <span></span>.  When the menu
  	// bar is vertical, they would be put in
  	// a separate TD cell.

  	// HTML code to the left of the folder item
  	mainFolderLeft: '',
  	// HTML code to the right of the folder item
  	mainFolderRight: '',
	// HTML code to the left of the regular item
	mainItemLeft: '',
	// HTML code to the right of the regular item
	mainItemRight: '',

	// sub menu display attributes

	// HTML code to the left of the folder item
	folderLeft: '',
	// HTML code to the right of the folder item
	folderRight: '',
	// HTML code to the left of the regular item
	itemLeft: '',
	// HTML code to the right of the regular item
	itemRight: '',
	// cell spacing for main menu
	mainSpacing: 0,
	// cell spacing for sub menus
	subSpacing: 0,
	// auto dispear time for submenus in milli-seconds
	delay: 500
};

//////////////////////////////////////////////////////////////////////
//
// Drawing Functions and Utility Functions
//
//////////////////////////////////////////////////////////////////////

//
// produce a new unique id
//
function cmNewID ()
{
	return _cmIDName + (++_cmIDCount);
}

//
// return the property string for the menu item
//
function cmActionItem (item, prefix, isMain, idSub, orient, nodeProperties, act, mx)
{
	var descript = (!item[4]) ? ((item[2] == null) ? '\'\'' : '\'' + item[2] + '\'') : ('\'' + item[4] + '\'');
	var url = (!item[2]) ? 'null' : ('\'' + item[2] + '\'');
	var target = (!item[3]) ? 'null' : ('\'' + item[3] + '\'');
	var hasChild = (item.length > 5) ? '1' : '0';
	idSub = (!idSub) ? 'null' : ('\'' + idSub + '\'');
	orient = '\'' + orient + '\'';
	prefix = '\'' + prefix + '\'';
	act = '\'' + act + '\'';
	mx = '\'' + mx + '\'';
	return ' onmouseover="cmItemMouseOver (this,' + prefix + ',' + isMain + ',' + idSub + ',' + orient + ',' + descript + ',' + act + ',' + mx + ')" onmouseout="cmItemMouseOut (this,' + nodeProperties.delay + ')" onmousedown="cmItemMouseDown (this)" onmouseup="cmItemMouseUp (this,' + hasChild + ', ' + url + ', ' + target + ')"';
}

function cmNoActionItem (item, prefix)
{
	return item[1];
}

function cmSplitItem (prefix, isMain, vertical)
{
	var classStr = 'cm' + prefix;
	if (isMain)
	{
		classStr += 'Main';
		if (vertical)
			classStr += 'HSplit';
		else
			classStr += 'VSplit';
	}
	else
		classStr += 'HSplit';
	var item = eval (classStr);
	return cmNoActionItem (item, prefix);
}

//
// draw the sub menu recursively
//
function cmDrawSubMenu (subMenu, prefix, id, orient, nodeProperties)
{
	var str = '<table summary="sub menu" cellspacing="' + nodeProperties.subSpacing + '" class="' + prefix + 'SubMenu" id="' + id + '">';
	var strSub = '';

	var item;
	var idSub;
	var hasChild;

	var i;

	var classStr;

	var act;

	for (i = 5; i < subMenu.length; ++i)
	{
		item = subMenu[i];
		if (item == undefined)
			continue;

		hasChild = (item.length > 5);
		idSub = hasChild ? cmNewID () : null;

		if (item == _cmSplit || item[0] == _cmNoAction)
			act = 'NoAction';
		else
			act = 'default';

		str += '<tr class="' + prefix + 'MenuItem"' + cmActionItem (item, prefix, 0, idSub, orient, nodeProperties, act, 0) + '>';

		if (item == _cmSplit)
		{
			str += cmSplitItem (prefix, 0, true);
			str += '</tr>';
			continue;
		}

		if (item[0] == _cmNoAction)
		{
			str += cmNoActionItem (item, prefix);
			str += '</tr>';
			continue;
		}

		classStr = prefix + 'Menu';
		classStr += hasChild ? 'Folder' : 'Item';

		str += '<td class="' + classStr + 'Left">';

		if (item[0] != null && item[0] != _cmNoAction)
			str += item[0];
		else
			str += hasChild ? nodeProperties.folderLeft : nodeProperties.itemLeft;

		str += '<td class="' + classStr + 'Text">' + item[1];

		str += '<td class="' + classStr + 'Right">';

		if (hasChild)
		{
			str += nodeProperties.folderRight;
			strSub += cmDrawSubMenu (item, prefix, idSub, orient, nodeProperties);
		}
		else
			str += nodeProperties.itemRight;
		str += '</td></tr>';
	}

	str += '</table>' + strSub;
	return str;
}

//
// The function that builds the menu inside the specified element id.
//
// @param	id	id of the element
//		orient	orientation of the menu in [hv][ab][lr] format
//		menu	the menu object to be drawn
//		nodeProperties	properties for each menu node
//
function cmDraw (id, menu, orient, nodeProperties, prefix, wo)
{
	var obj = cmGetObject (id);
	was = wo;
	if (!nodeProperties)
		nodeProperties = cmNodeProperties;
	if (!prefix)
		prefix = '';

	var str = '<table summary="main menu" class="' + prefix + 'Menu" cellspacing="' + nodeProperties.mainSpacing + '">';
	var strSub = '';

	if (!orient)
		orient = 'hbr';

	var orientStr = String (orient);
	var orientSub;
	var vertical;

	// draw the main menu items
	if (orientStr.charAt (0) == 'h')
	{
		// horizontal menu
		orientSub = 'v' + orientStr.substr (1, 2);
		str += '<tr>';
		vertical = false;
	}
	else
	{
		// vertical menu
		orientSub = 'v' + orientStr.substr (1, 2);
		vertical = true;
	}

	var i;
	var item;
	var idSub;
	var hasChild;

	var classStr;
	var act;

	for (i = 0; i < menu.length; ++i)
	{
		item = menu[i];

		if (!item)
			continue;

		str += vertical ? '<tr' : '<td';
				{
				if (i == was)
					str += ' class="' + prefix + 'MainItemx"';
				else
					str += ' class="' + prefix + 'MainItem"';
				}
		//str += ' class="' + prefix + 'MainItem"';
		hasChild = (item.length > 5);
		idSub = hasChild ? cmNewID () : null;

		if (item == _cmSplit || item[0] == _cmNoAction)
			act = 'NoAction';
		else
			act = 'default';

		str += cmActionItem (item, prefix, 1, idSub, orient, nodeProperties, act, i) + '>';

		if (item == _cmSplit)
		{
			str += cmSplitItem (prefix, 1, vertical);
			str += vertical? '</tr>' : '</td>';
			continue;
		}

		if (item[0] == _cmNoAction)
		{
			str += cmNoActionItem (item, prefix);
			str += vertical? '</tr>' : '</td>';
			continue;
		}

		classStr = prefix + 'Main' + (hasChild ? 'Folder' : 'Item');
		
		
		str += vertical ? '<td' : '<span';
		str += ' class="' + classStr + 'Left">';

		str += (item[0] == null) ? (hasChild ? nodeProperties.mainFolderLeft : nodeProperties.mainItemLeft)
					 : item[0];
		str += vertical ? '</td>' : '</span>';

		str += vertical ? '<td' : '<span';
		str += ' class="' + classStr + 'Text">';
		str += item[1];

		str += vertical ? '</td>' : '</span>';

		str += vertical ? '<td' : '<span';
		str += ' class="' + classStr + 'Right">';

		str += hasChild ? nodeProperties.mainFolderRight : nodeProperties.mainItemRight;

		str += vertical ? '</td>' : '</span>';

		str += vertical ? '</tr>' : '</td>';

		if (hasChild)
			strSub += cmDrawSubMenu (item, prefix, idSub, orientSub, nodeProperties);
	}
	if (!vertical)
		str += '</tr>';
	str += '</table>' + strSub;
	obj.innerHTML = str;
	//document.write ("<xmp>" + str + "</xmp>");
}

//////////////////////////////////////////////////////////////////////
//
// Mouse Event Handling Functions
//
//////////////////////////////////////////////////////////////////////

//
// action should be taken for mouse moving in to the menu item
//
function cmItemMouseOver (obj, prefix, isMain, idSub, orient, descript, act, mx)
{
	var wx = -1
	clearTimeout (_cmTimeOut);

	if (obj.cmPrefix == undefined)
	{
		obj.cmPrefix = prefix;
		obj.cmIsMain = isMain;
		obj.cmAct = act;
		obj.nr = mx;
	}

	var thisMenu = cmGetThisMenu (obj, prefix);

	// insert obj into cmItems if cmItems doesn't have obj
	if (!thisMenu.cmItems)
		thisMenu.cmItems = new Array ();
	var i;
	for (i = 0; i < thisMenu.cmItems.length; ++i)
	{
		if (thisMenu.cmItems[i] == obj)
			break;
	}
	if (i == thisMenu.cmItems.length)
		thisMenu.cmItems.push (obj);

	// hide the previous submenu that is not this branch
	if (_cmCurrentItem)
	{
		// occationally, we get this case when user
		// move the mouse slowly to the border
		if (_cmCurrentItem == thisMenu)
			return;

		var thatPrefix = _cmCurrentItem.cmPrefix;
		var thatMenu = cmGetThisMenu (_cmCurrentItem, thatPrefix);
		if (thatMenu != thisMenu.cmParentMenu)
		{
			if (_cmCurrentItem.cmIsMain)
				//_cmCurrentItem.className = thatPrefix + 'MainItem';
				
				{
				wx= wx + 1
				if (wx == was)
					_cmCurrentItem.className = thatPrefix + 'MainItemx';
				else
					_cmCurrentItem.className = thatPrefix + 'MainItem';
				}

			else
				_cmCurrentItem.className = thatPrefix + 'MenuItem';
			if (thatMenu.id != idSub)
				cmHideMenu (thatMenu, thisMenu, thatPrefix);
		}
	}

	// okay, set the current menu to this obj
	_cmCurrentItem = obj;

	// just in case, reset all items in this menu to MenuItem
	cmResetMenu (thisMenu, prefix);

	if (act == 'default')
	{
		if (isMain)
			obj.className = prefix + 'MainItemHover';
		else
			obj.className = prefix + 'MenuItemHover';
	}

	if (idSub)
	{
		var subMenu = cmGetObject (idSub);
		cmShowSubMenu (obj, prefix, subMenu, orient);
	}

	if (descript != null)
		window.status = descript;
}

//
// action should be taken for mouse moving out of the menu item
//
function cmItemMouseOut (obj, delayTime)
{
	if (!delayTime)
		delayTime = _cmNodeProperties.delay;
	_cmTimeOut = window.setTimeout ('cmHideMenuTime ()', delayTime);
	window.status = '';
}

//
// action should be taken for mouse button down at a menu item
//
function cmItemMouseDown (obj)
{
	if (obj.cmAct == 'default')
	{
		if (obj.cmIsMain)
			obj.className = obj.cmPrefix + 'MainItemActive';
		else
			obj.className = obj.cmPrefix + 'MenuItemActive';
	}
}

//
// action should be taken for mouse button up at a menu item
//
function cmItemMouseUp (obj, hasChild, link, target)
{
	if (link != null)
	{
		if (target == null)
			parent.open (link);
		else
			parent.open (link, target);
	}
	var prefix = obj.cmPrefix;
	var thisMenu = cmGetThisMenu (obj, prefix);
	if (!hasChild)
	{
		if (obj.cmAct == 'default')
		{
			if (obj.cmIsMain)
				obj.className = prefix + 'MainItem';

			else
				obj.className = prefix + 'MenuItem';
		}
		cmHideMenu (thisMenu, null, prefix);
	}
	else
	{
		if (obj.cmAct == 'default')
		{
			if (obj.cmIsMain)
				obj.className = prefix + 'MainItemHover';
			else
				obj.className = prefix + 'MenuItemHover';
		}
	}
}

//////////////////////////////////////////////////////////////////////
//
// Mouse Event Support Utility Functions
//
//////////////////////////////////////////////////////////////////////

//
// move submenu to the appropriate location
//
// @param	obj	the menu item that opens up the subMenu
//		subMenu	the sub menu to be shown
//		orient	the orientation of the subMenu
//
function cmMoveSubMenu (obj, subMenu, orient)
{
	var mode = String (orient);
	if (mode.charAt (0) == 'h')
	{
		if (mode.charAt (1) == 'b')
			subMenu.style.top = cmGetY (obj) + obj.offsetHeight;
		else
			subMenu.style.top = cmGetY (obj) - subMenu.offsetHeight;
		if (mode.charAt (2) == 'r')
			subMenu.style.left = cmGetX (obj);
		else
			subMenu.style.left = cmGetX (obj) + obj.offsetWidth - subMenu.offsetWidth;
	}
	else
	{
		if (mode.charAt (2) == 'r')
			subMenu.style.left = cmGetX (obj) + obj.offsetWidth;
		else
			subMenu.style.left = cmGetX (obj) - subMenu.offsetWidth;
		if (mode.charAt (1) == 'b')
			subMenu.style.top = cmGetY (obj);
		else
			subMenu.style.top = cmGetY (obj) + obj.offsetHeight - subMenu.offsetHeight;
	}
}

//
// show the subMenu w/ specified orientation
// also move it to the correct coordinates
//
// @param	obj	the menu item that opens up the subMenu
//		subMenu	the sub menu to be shown
//		orient	the orientation of the subMenu
//
function cmShowSubMenu (obj, prefix, subMenu, orient)
{
	subMenu.style.display = 'block';
	subMenu.style.visibility = 'visible';

	if (subMenu.cmParentMenu == undefined)
	{
		// establish the tree w/ back edge
		var thisMenu = cmGetThisMenu (obj, prefix);
		subMenu.cmParentMenu = thisMenu;
		if (!thisMenu.cmSubMenu)
			thisMenu.cmSubMenu = new Array ();
		thisMenu.cmSubMenu.push (subMenu);

	}
	// position the sub menu
	cmMoveSubMenu (obj, subMenu, orient);

	//
	// On IE, controls such as SELECT, OBJECT, IFRAME (before 5.5)
	// are window based controls.  So, if sub menu and these controls
	// overlap, sub menu would be hid behind them.  Thus, one needs to
	// turn the visibility of these controls off when the
	// sub menu is showing, and turn their visibility back on
	//
	if (document.all)	// it is IE
	{
		subMenu.cmOverlap = new Array ();
/*@cc_on @*/
/*@if (@_jscript_version >= 5.5)
@else @*/
		cmHideControl ("IFRAME", subMenu);
/*@end @*/
		cmHideControl ("SELECT", subMenu);
		cmHideControl ("OBJECT", subMenu);
	}

}

//
// reset all the menu items to class MenuItem in thisMenu
//
function cmResetMenu (thisMenu, prefix)
{
	if (thisMenu.cmItems)
	{
		var wx = -1;
		var i;
		var str;
		var items = thisMenu.cmItems;
		wx = -1;
		for (i = 0; i < items.length; ++i)
		{
			if (items[i].cmIsMain)
				{
				wx=wx + 1
				if (items[i].nr == was)
					str = prefix + 'MainItemx';
				else
					str = prefix + 'MainItem';
				}
			else
				str = prefix + 'MenuItem';
			if (items[i].className != str)
				items[i].className = str;
		}
	}
}

//
// called by the timer to hide the menu
//
function cmHideMenuTime ()
{
	if (_cmCurrentItem)
	{
		var prefix = _cmCurrentItem.cmPrefix;
		cmHideMenu (cmGetThisMenu (_cmCurrentItem, prefix), null, prefix);
	}
}

//
// hide thisMenu, children of thisMenu, as well as the ancestor
// of thisMenu until currentMenu is encountered.  currentMenu
// will not be hidden
//
function cmHideMenu (thisMenu, currentMenu, prefix)
{
	var str = prefix + 'SubMenu';

	// hide the down stream menus
	if (thisMenu.cmSubMenu)
	{
		var i;
		for (i = 0; i < thisMenu.cmSubMenu.length; ++i)
		{
			cmHideSubMenu (thisMenu.cmSubMenu[i], prefix);
		}
	}

	// hide the upstream menus
	while (thisMenu && thisMenu != currentMenu)
	{
		cmResetMenu (thisMenu, prefix);
		if (thisMenu.className == str)
		{
			thisMenu.style.visibility = 'hidden';
			cmShowControl (thisMenu);
		}
		else
			break;
		thisMenu = cmGetThisMenu (thisMenu.cmParentMenu, prefix);
	}
}

//
// hide thisMenu as well as its sub menus if thisMenu is not
// already hidden
//
function cmHideSubMenu (thisMenu, prefix)
{
	if (thisMenu.style.visibility == 'hidden')
		return;
	if (thisMenu.cmSubMenu)
	{
		var i;
		for (i = 0; i < thisMenu.cmSubMenu.length; ++i)
		{
			cmHideSubMenu (thisMenu.cmSubMenu[i], prefix);
		}
	}
	cmResetMenu (thisMenu, prefix);
	thisMenu.style.visibility = 'hidden';
	cmShowControl (thisMenu);
}

//
// hide a control such as IFRAME
//
function cmHideControl (tagName, subMenu)
{
	var x = cmGetX (subMenu);
	var y = cmGetY (subMenu);
	var w = subMenu.offsetWidth;
	var h = subMenu.offsetHeight;

	var i;
	for (i = 0; i < document.all.tags(tagName).length; ++i)
	{
		var obj = document.all.tags(tagName)[i];
		if (!obj || !obj.offsetParent)
			continue;

		// check if the object and the subMenu overlap

		var ox = cmGetX (obj);
		var oy = cmGetY (obj);
		var ow = obj.offsetWidth;
		var oh = obj.offsetHeight;

		if (ox > (x + w) || (ox + ow) < x)
			continue;
		if (oy > (y + h) || (oy + oh) < y)
			continue;
		subMenu.cmOverlap.push (obj);
		obj.style.visibility = "hidden";
	}
}

//
// show the control hidden by the subMenu
//
function cmShowControl (subMenu)
{
	if (subMenu.cmOverlap)
	{
		var i;
		for (i = 0; i < subMenu.cmOverlap.length; ++i)
			subMenu.cmOverlap[i].style.visibility = "";
	}
	subMenu.cmOverlap = null;
}

//
// returns the main menu or the submenu table where this obj (menu item)
// is in
//
function cmGetThisMenu (obj, prefix)
{
	var str1 = prefix + 'SubMenu';
	var str2 = prefix + 'Menu';
	while (obj)
	{
		if (obj.className == str1 || obj.className == str2)
			return obj;
		obj = obj.parentNode;
	}
	return null;
}

//
// returns the object baring the id
//
function cmGetObject (id)
{
	if (document.all)
		return document.all[id];
	return document.getElementById (id);
}

//
// functions that obtain the coordinates of an HTML element
//
function cmGetX (obj)
{
	var x = 0;
	while (obj.offsetParent)
	{
		x += obj.offsetLeft;
		obj = obj.offsetParent;
	}
	return x;
}

function cmGetY (obj)
{
	var y = 0;
	while (obj.offsetParent)
	{
		y += obj.offsetTop;
		obj = obj.offsetParent;
	}
	return y;
}

//
// debug function, ignore :)
//
function cmGetProperties (obj)
{
	if (obj == undefined)
		return 'undefined';
	if (obj == null)
		return 'null';

	var msg = 'Properties for ' + obj;
	var i;
	for (i in obj)
		msg += i + ' := ' + obj[i] + ', ';
	return msg;
}

/* JSCookMenu v1.1.  added ability to hide controls in IE to show submenus properly */
/* JSCookMenu v1.01. cmDraw generates XHTML code */
/* JSCookMenu v1.0.  (c) Copyright 2002 by Heng Yuan */