// Title: tigra menu
// Description: See the demo at url
// URL: http://www.softcomplex.com/products/tigra_menu/
// Version: 2.0 (commented source)
// Date: 04-05-2003 (mm-dd-yyyy)
// Tech. Support: http://www.softcomplex.com/forum/forumdisplay.php?fid=40
// Notes: This script is free. Visit official site for further details.
//--------------------------------------------------------------------------------
// global collection containing all menus on current page
var A_MENUS = [];
// --------------------------------------------------------------------------------
// menu class

	function menu (a_items, a_tpl) 
	{
	// browser check
	if (!document.body || !document.body.style)
	return;

	
	
	// store items structure
	this.a_config = a_items;
	
	// store template structure
	this.a_tpl = a_tpl;
	
	// get menu id
	this.n_id = A_MENUS.length;
	
	//declare collections
	this.a_index = [];
	this.a_children = [];
	
	// assigh methods and event handlers
	this.expand      = menu_expand;
	this.collapse    = menu_collapse;
	this.onclick     = menu_onclick;
	this.onmouseout  = menu_onmouseout;
	this.onmouseover = menu_onmouseover;
	this.onmousedown = menu_onmousedown;
	
	// default level scope description structure 
	this.a_tpl_def = {
			'block_top'  : 16,
			'block_left' : 16,
			'top'        : 20,
			'left': 4,
			'width'      : 120,
			'height'     : 220,
			'hide_delay' : 0,
			'expd_delay' : 0,
			'css'        : {
					'inner' : '',	
					'outer' : ''
					}
			};
	// assign methods and properties required to imulate parent item
	this.getprop = function (s_key) 
	{	
	return this.a_tpl_def[s_key];
	};
	
	this.o_root = this;
	this.n_depth = -1;
	this.n_x = 0;
	this.n_y = 0;
	
	//	init items recursively
	for (n_order = 0; n_order < a_items.length; n_order++)
		new menu_item(this, n_order);
		// register self in global collection
		A_MENUS[this.n_id] = this;
		
		// make root level visible
		for (var n_order = 0; n_order < this.a_children.length; n_order++)
			this.a_children[n_order].e_oelement.style.visibility = 'visible';
	}

// --------------------------------------------------------------------------------
	function menu_collapse (n_id) 
	{	
		// cancel item open delay	
		clearTimeout(this.o_showtimer);
	
		// by default collapse to root level
		var n_tolevel = (n_id ? this.a_index[n_id].n_depth :0);
	
		// hide all items over the level specified
		for (n_id = 0; n_id < this.a_index.length; n_id++) 
		{
			var o_curritem = this.a_index[n_id];
			if (o_curritem.n_depth > n_tolevel && o_curritem.b_visible) 
			{			
				o_curritem.e_oelement.style.visibility = 'hidden';
				o_curritem.b_visible = false;
			}
		}

		// reset current item if mouse has gone out of items
		if (!n_id)
		this.o_current = null;
	}
//--------------------------------------------------------------------------------

	function menu_expand (n_id) 
	{
		// expand only when mouse is over some menu item
		if (this.o_hidetimer)
		return;
	
		// lookup current item
		var o_item = this.a_index[n_id];
		
		// close previously opened items
		if (this.o_current && this.o_current.n_depth >= o_item.n_depth)
			this.collapse(o_item.n_id);
			this.o_current = o_item;
	
		// exit if there are no children to open
		if (!o_item.a_children)
			return;
	
		// show direct child items
		for (var n_order = 0; n_order < o_item.a_children.length; n_order++) 
		{
			var o_curritem = o_item.a_children[n_order];
			o_curritem.e_oelement.style.visibility = 'visible';
			o_curritem.b_visible = true;
		}
	}

// --------------------------------------------------------------------------------
//
// --------------------------------------------------------------------------------

	function menu_onclick (n_id) 
	{
		// don't go anywhere if item has no link defined
		return Boolean(this.a_index[n_id].a_config[1]);
	}
	
// --------------------------------------------------------------------------------

	function menu_onmouseout (n_id) 
	{
		// lookup new item's object	
		var o_item = this.a_index[n_id];
		
		// apply rollout
		o_item.e_oelement.className = o_item.getstyle(0, 0);
		o_item.e_ielement.className = o_item.getstyle(1, 0);
	
		// update status line	
		o_item.upstatus(7);
	
		// run mouseover timer
		this.o_hidetimer = setTimeout('A_MENUS['+ this.n_id +'].collapse();',
		o_item.getprop('hide_delay'));
	}

// --------------------------------------------------------------------------------

	function menu_onmouseover (n_id) 
	{
		// cancel mouseoute menu close and item open delay
		clearTimeout(this.o_hidetimer);
		this.o_hidetimer = null;
		clearTimeout(this.o_showtimer);
	
		// lookup new item's object	
		var o_item = this.a_index[n_id];
	
		// update status line	
		o_item.upstatus();
		
		// apply rollover
		o_item.e_oelement.className = o_item.getstyle(0, 1);
		o_item.e_ielement.className = o_item.getstyle(1, 1);
	
		// if onclick open is set then no more actions required
		if (o_item.getprop('expd_delay') < 0)
			return;

		// run expand timer
		this.o_showtimer = setTimeout('A_MENUS['+ this.n_id +'].expand(' + n_id + ');',
		o_item.getprop('expd_delay'));
	}

// --------------------------------------------------------------------------------
// called when mouse button is pressed on menu item
// --------------------------------------------------------------------------------

	function menu_onmousedown (n_id) 
	{
		// lookup new item's object	
		var o_item = this.a_index[n_id];
		
		// apply mouse down style
		o_item.e_oelement.className = o_item.getstyle(0, 2);
		o_item.e_ielement.className = o_item.getstyle(1, 2);
		this.expand(n_id);
		//this.items[id].switch_style('onmousedown');
	}

// --------------------------------------------------------------------------------
// menu item Class
	function menu_item (o_parent, n_order) 
	{
		// store parameters passed to the constructor
		this.n_depth  = o_parent.n_depth + 1;
		this.a_config = o_parent.a_config[n_order + (this.n_depth ? 3 : 0)];
	
		// return if required parameters are missing
		if (!this.a_config) return;
	
		// store info from parent item
		this.o_root    = o_parent.o_root;
		this.o_parent  = o_parent;
		this.n_order   = n_order;
	
		// register in global and parent's collections
		this.n_id = this.o_root.a_index.length;
		this.o_root.a_index[this.n_id] = this;
		o_parent.a_children[n_order] = this;
	
		// calculate item's coordinates
		var o_root = this.o_root,
		a_tpl  = this.o_root.a_tpl;
	
		// assign methods
		this.getprop  = mitem_getprop;
		this.getstyle = mitem_getstyle;
		this.upstatus = mitem_upstatus;
		this.n_x = n_order ? o_parent.a_children[n_order - 1].n_x + this.getprop('left') : o_parent.n_x + this.getprop('block_left');
		this.n_y = n_order ? o_parent.a_children[n_order - 1].n_y + this.getprop('top')	: o_parent.n_y + this.getprop('block_top');

		// generate item's HMTL
		document.write 	(
			'<a id="e' + o_root.n_id + '_' + this.n_id +'o" class="' + this.getstyle(0, 0)	+ '" href="' + 			this.a_config[1] + '"'	+ (this.a_config[2]  ? ' target="'+ this.a_config[2]['tw'] + '"' : '') 	+  ' style="position: absolute; top: '
			+ this.n_y + 'px; left: ' + this.n_x + 'px; width: '
			+ this.getprop('width') + 'px; height: '
			+ this.getprop('height') + 'px; visibility: hidden;'
			+' z-index: ' + this.n_depth + ';" '
			+ 'onclick="return A_MENUS[' + o_root.n_id + '].onclick('
			+ this.n_id + ');" onmouseout="A_MENUS[' + o_root.n_id + '].onmouseout('
			+ this.n_id + ');" onmouseover="A_MENUS[' + o_root.n_id + '].onmouseover('
			+ this.n_id + ');" onmousedown="A_MENUS[' + o_root.n_id + '].onmousedown('
			+ this.n_id + ');"><div  id="e' + o_root.n_id + '_'
			+ this.n_id +'i" class="' + this.getstyle(1, 0) + '">'
			+ this.a_config[0] + "</div></a>\n"
		);
	this.e_ielement = document.getElementById('e' + o_root.n_id + '_' + this.n_id + 'i');
	this.e_oelement = document.getElementById('e' + o_root.n_id + '_' + this.n_id + 'o');

	this.b_visible = !this.n_depth;

	// no more initialization if leaf
	if (this.a_config.length < 4)
		return;

	// node specific methods and properties
	this.a_children = [];

	// init downline recursively
	for (var n_order = 0; n_order < this.a_config.length - 3; n_order++)
		new menu_item(this, n_order);
}

// --------------------------------------------------------------------------------
// reads property from template file, inherits from parent level if not found
// ------------------------------------------------------------------------------------------
	function mitem_getprop (s_key) 
	{
		// check if value is defined for current level
		var s_value = null,
		a_level = this.o_root.a_tpl[this.n_depth];
		
		// return value if explicitly defined
		if (a_level)
		s_value = a_level[s_key];
	
		// request recursively from parent levels if not defined
		return (s_value == null ? this.o_parent.getprop(s_key) : s_value);
	}

// --------------------------------------------------------------------------------
// reads property from template file, inherits from parent level if not found
// ------------------------------------------------------------------------------------------

	function mitem_getstyle (n_pos, n_state) 
	{
		var a_css = this.getprop('css');
		var a_oclass = a_css[n_pos ? 'inner' : 'outer'];
	
		// same class for all states	
		if (typeof(a_oclass) == 'string')
			return a_oclass;
	
		// inherit class from previous state if not explicitly defined
		for (var n_currst = n_state; n_currst >= 0; n_currst--)
			if (a_oclass[n_currst])	return a_oclass[n_currst];
	}

// ------------------------------------------------------------------------------------------
// updates status bar message of the browser
// ------------------------------------------------------------------------------------------
	function mitem_upstatus (b_clear) 
	{
		window.setTimeout("window.status=unescape('" + (b_clear	? ''	
			: (this.a_config[2] && this.a_config[2]['sb'] ? escape(this.a_config[2]['sb'])
			: escape(this.a_config[0]) + (this.a_config[1] ? ' ('+ escape(this.a_config[1]) + ')'
			: ''))) + "')", 10);
	}

// --------------------------------------------------------------------------------
// that's all folks