/****************************************************************************************/
/*  Copyright (C) 2004 Rob Johnson <robjohnson@black-hole.com>                          */
/*                                                                                      */
/*  This program IS NOT free software; you may not use, redistribute or modify          */
/*  without the permission of the author.  For licensing and purchasing information     */
/*  please visit http://www.script-source.net/ .                                        */
/*                                                                                      */
/*  For more information and a demo please visit http://www.script-source.net/ .        */
/****************************************************************************************/


function menuClass() {
	this.menus = new Array();
	this.rolldowndelay = 25;
	this.rollupdelay = 25;
	this.menuHeadingClassName = '';
	this.menuItemClassName = '';
	this.menuItemSelectedClassName = '';
	this.menuItemBullet = '';
	this.menuItemSpacing = 2;

	this.cookiename = 'expmnujs';
	this.withid = 0;
	this.initflag = false;
	this.uniquekey = '';
	this.menustate = new Array();

	if(!window.menulist) window.menulist = new Array();
	if(!window.menuitemlist) window.menuitemlist = new Array();

	this.init = function() {
		if(this.initflag) return;

		// make a unique id for this menu
		var sum = len = 0;
		for(var m=0; m<this.menus.length; ++m) {
			len += this.menus[m].menutitle.length;
			sum += this.stringsum(this.menus[m].menutitle);
		 	for(var i=0; i<this.menus[m].menuitems.length; ++i) {
				sum += this.stringsum(this.menus[m].menuitems[i].itemtitle);
				len += this.menus[m].menuitems[i].itemtitle.length;
			}
		}
		this.uniquekey = sum + len;

		// parse cookies
		var ckname = this.cookiename + this.uniquekey;
		var start = document.cookie.indexOf(ckname);
		if(start > -1) {
			start += ckname.length + 1;
			var end = document.cookie.indexOf(';', start); if(end == -1) end = document.cookie.length;
			var data =  document.cookie.substring(start, end);
			var bits = data.split('|');

			var menustate = new Array();
			for(var b=0; b<bits.length; ++b) {
				var keyval = bits[b].split(':');
				keyval[1] *= 1;
				menustate[keyval[0]] = keyval[1];
			}
			this.menustate = menustate;
		}

		// set display status for menus
		for(var m=0; m<this.menus.length; ++m) {
			this.menus[m].status = (this.menustate[m]) ? 1 : 0;
		}

		// highlight current page link
		if(this.menuItemSelectedClassName) {
			var keyname = this.cookiename + 'click=';
			var start = document.location.href.indexOf(keyname);
			if(start > -1) {
				start += keyname.length;
				var end = document.location.href.indexOf('&', start);
				if(end < 0) end = document.location.href.indexOf('#', start);
				if(end < 0) end = document.location.href.length;
				var data = document.location.href.substring(start, end);
				var bits = data.split('-');
	
				if(bits.length == 3 && (1 * bits[0]) == this.uniquekey) {
					bits[1] *= 1; bits[2] *= 1;
					if(typeof(this.menus[bits[1]]) != 'undefined' && typeof(this.menus[bits[1]].menuitems[bits[2]]) != 'undefined') {
						this.menus[bits[1]].status = 1;
						this.menus[bits[1]].menuitems[bits[2]].selected = 1;
					}
				}
			}
		}
	}
	this.stringsum = function(str) {
		val = 0; for(var i=0; i<str.length; ++i) { val += str.charCodeAt(i); } return val;
	}

	this.write = function() {
		this.init();

		var buf = '';
		buf += '<table style="border:none;" width="150" cellpadding="0" cellspacing="'+this.menuItemSpacing+'">';

		var bullet = '';
		if(this.menuItemBullet) {
			bullet = '<img src="'+this.menuItemBullet+'" border="0" alt="" align="absmiddle"> ';
		}

		for(var m=0; m<this.menus.length; ++m) {
			var display = (this.menus[m].status) ? '' : 'display:none;';

			buf += '<tr class="test"><td class="'+this.menus[m].classname+'" valign="center"><a href="javascript:void(0);" onclick="window.menulist['+this.menus[m].menuid+'].click()">'+this.menus[m].menutitle+'</a></td></tr>';
		 	for(var i=0; i<this.menus[m].menuitems.length; ++i) {
				var classname = (this.menuItemSelectedClassName && this.menus[m].menuitems[i].selected) ? this.menuItemSelectedClassName : this.menus[m].menuitems[i].classname;
				buf += '<tr id="menuitem_'+this.menus[m].menuitems[i].menuitemid+'" style="'+display+'"><td id="td_menuitem_'+this.menus[m].menuitems[i].menuitemid+'" class="'+classname+'" valign="center">'+bullet+'<a href="'+this.menus[m].menuitems[i].itemhref+'" target="'+this.menus[m].menuitems[i].itemhreftarget+'" onclick="return window.menuitemlist['+this.menus[m].menuitems[i].menuitemid+'].click(this)">'+this.menus[m].menuitems[i].itemtitle+'</a></td></tr>';
			}
		}
		buf += '</table>';
		document.write(buf);
	}

	this.savestate = function() {
		var ckname = this.cookiename + this.uniquekey;
		var ckval = '';
		var menustate = new Array();
		for(var m=0; m<this.menus.length; ++m) {
			ckval += m + ':' + this.menus[m].status + '|';
			menustate[m] = this.menus[m].status;
		}
		ckval = ckval.substr(0, ckval.length-1);
		document.cookie = ckname +'='+ ckval + ';';
		this.menustate = menustate;
	}

	this.createMenu = function(menutitle, classname) {
		this.createHeading(menutitle, classname);
	}
	this.createHeading = function(menutitle, classname) {
		this.withid = this.menus.length;
		this.menus[this.withid] = new menu(this, menutitle, classname, this.withid);
		this.menus[this.withid].menuid = window.menulist.length;
		window.menulist[this.menus[this.withid].menuid] = this.menus[this.withid];
	}
	this.addItem = function(itemname, itemhref, itemhreftarget, classname) {
		this.menus[this.withid].addItem(itemname, itemhref, itemhreftarget, classname);
	}
}
function menu(parent, menutitle, classname, index) {
	this.parent = parent;
	this.menutitle = menutitle;
	this.classname = (classname) ? classname : this.parent.menuHeadingClassName;
	this.menuid = 0;
	this.index = index;
	this.menuitems = new Array();
	this.status = 0;

	this.addItem = function(itemname, itemhref, itemhreftarget, classname) {
		var id = this.menuitems.length;
		this.menuitems[id] = new menuItem(this, itemname, itemhref, itemhreftarget, classname, id);
		this.menuitems[id].menuitemid = window.menuitemlist.length;
		window.menuitemlist[this.menuitems[id].menuitemid] = this.menuitems[id];
	}
	this.click = function() {
		if(!this.status) this.expand();
		else this.contract();
	}
	this.expand = function() {
		var curdelay = 0;
		for(var i=0; i<this.menuitems.length; ++i) {
			curdelay += this.parent.rolldowndelay;
			setTimeout("document.getElementById('menuitem_"+this.menuitems[i].menuitemid+"').style.display = '';", curdelay);
		}
		this.status = 1;
		this.parent.savestate();
	}
	this.contract = function() {
		var curdelay = 0;
		for(var i=this.menuitems.length-1; i>=0; --i) {
			curdelay += this.parent.rollupdelay;
			setTimeout("document.getElementById('menuitem_"+this.menuitems[i].menuitemid+"').style.display = 'none';", curdelay);
		}

		this.status = 0;
		this.parent.savestate();
	}

}
function menuItem(menuref, itemtitle, itemhref, itemhreftarget, classname, index) {
	this.menu = menuref;
	this.classname = (classname) ? classname : this.menu.parent.menuItemClassName;
	this.itemtitle = itemtitle;
	this.itemhref = itemhref;
	this.itemhreftarget = (itemhreftarget) ? itemhreftarget : '_self';
	this.menuitemid = 0;
	this.selected = 0;
	this.index = index;

	this.click = function(that) {
		this.select();

		// don't bother with this if theres no selected classname
		if(!this.menu.parent.menuItemSelectedClassName) return true;

		// determine if we're leaving this site
		var matches = that.href.match(/https?:\/\/(www\.)?([a-zA-Z0-9\-\.]+)/);
		if(matches && matches.length > 0) {
			var dl = document.location.href + '';
			if(dl.toLowerCase().indexOf(matches[2].toLowerCase()) < 0) return true; 
		}

		// if the page uses a frameset, we may have already set this
		var keyname = this.menu.parent.cookiename + 'click=';
		if(that.href.indexOf(keyname) > -1) {
			return true;
		}
		var urldata = keyname + this.menu.parent.uniquekey + '-' + this.menu.index + '-' + this.index;

		var bits = that.href.split('#');
		var targethref = anchor = '';

		if(bits.length > 1) {
			targethref = bits[0];
			anchor = bits[1];
		} else {
			targethref = that.href;
		}

		var hasqs = (targethref.indexOf('?') > -1) ? 1 : 0;
		newhref = targethref;
		newhref += (targethref.indexOf('?') > -1) ? '&' : '?';
		newhref += urldata;
		if(anchor) newhref += '#' + anchor;

		that.href = newhref;

		return true;
	}

	this.select = function() {
		if(this.menu.parent.menuItemSelectedClassName) {
			for(var m=0; m<this.menu.parent.menus.length; ++m) {
				for(var i=0; i<this.menu.parent.menus[m].menuitems.length; ++i) {
					this.menu.parent.menus[m].menuitems[i].deselect();
				}
			}
			document.getElementById('td_menuitem_' +this.menuitemid).className = this.menu.parent.menuItemSelectedClassName;
			this.selected = 1;
		}
	}
	this.deselect = function() {
		if(this.menu.parent.menuItemSelectedClassName && this.selected) {
			document.getElementById('td_menuitem_' +this.menuitemid).className = this.classname;
			this.selected = 0;
		}
	}
}