var lastMenuId = 0;
var timer;
var mSheets = new Array();
var currZ = 100;
var mReady = false;
var menu_path = new Array();

var agt = navigator.userAgent.toLowerCase ();
var is_ie = ((agt.indexOf ("msie") != -1) && (agt.indexOf ("opera") == -1) && (agt.indexOf ("safari") == -1));


function setClass(obj, cl){
	if (obj.className!=cl) obj.className = cl;
}

function MenuLink(textVal, linkVal, subVal){
	this.text = textVal;
	this.action = linkVal;
	this.submenu = subVal;
}

function menuHideAll(){
	for (var c in mSheets) mSheets[c].hide();
}

function menuHideTimerSet(){
	timer = window.setTimeout(menuHideAll, 300);
}

function menuHideTimerReset(){
	if (timer) window.clearTimeout(timer);
}

function menuAddLink(textVal, linkVal){
	this.links[this.links.length] = new MenuLink(textVal, linkVal, null);
}

function menuAddSubmenu(textVal, linkVal){
	this.links[this.links.length] = new MenuLink(textVal, linkVal, new MenuSheet(this));
}

function menuShow(leftVal, topVal, obj){
	this.block.style.left = leftVal + "px";
	this.block.style.top = topVal + "px";
	this.block.style.display = "block";
	
	hideShowCovered ( this.block, false );
}

function menuHide(){
	this.hideCh();
	this.block.style.display = "none";
	hideShowCovered ( this.block, true );
}

function menuFlip(leftVal, topVal){
	var disp = this.block.style.display;
	if (disp == "none") this.show(leftVal, topVal);
	else this.hide();
}

function menuHideCh(){
	for (var c in this.links){
		curLink = this.links[c];
		if (curLink.submenu) curLink.submenu.hide();
	}
}

function menuCreate(path){
	//if (!mSheets) return;
	var res = "<table><tr><td class=\"menu-sh\" onmouseout=\"menuHideTimerSet()\" onmouseover=\"menuHideTimerReset()\">";
	
	//res +="<table cellpadding=\"0\" cellspacing=\"0\"><tr><td class=\"selected-menu hand\" onclick=\"gotoURL('" + mSheets[this.id].menuLink + "')\">"+mSheets[this.id].menuTitle+"</td></tr></table>";
	
	res +="<table cellpadding=\"0\" cellspacing=\"0\" class=\"tab-menu-sh\">";
	var curLink;
	var newPath;
	if (path == null) path = "mSheets[" + this.id + "]";
	for (var c in this.links){
		curLink = this.links[c];
		res += "<tr valign=\"center\"><td class=\"blk-menu-sh";
		if (curLink.submenu) res += " blk-menu-arr";
		res += "\" onmouseover=\"setClass(this, 'blk-menu-sh-act";
		if (curLink.submenu) res += " blk-menu-arr-act";
		res += "'); ";
		res += path + ".hideCh()";
		if (curLink.submenu){
			newPath = path + ".links[" + c + "].submenu";
			res += "; " + newPath + ".show(getLeftPos(this) + this.offsetWidth, getTopPos(this) - 1,this)";
			curLink.submenu.create(newPath);
		}
		res += "\" onmouseout=\"setClass(this, 'blk-menu-sh";
		if (curLink.submenu) res += " blk-menu-arr";
		res += "')\" onclick=\"gotoURL('"+curLink.action+"')\" nowrap=\"nowrap\">" + curLink.text + "</td></tr>";
	}
	res += "</table></td></tr>";
	//res += "</table>";
	this.block.innerHTML = res;
}

function MenuSheet(parentObj){
	this.links = new Array();
	this.addLink = menuAddLink;
	this.addSubmenu = menuAddSubmenu;
	this.create = menuCreate;
	this.menuTitle = '';
	this.menuLink = '';
	this.show = menuShow;
	this.hide = menuHide;
	this.flip = menuFlip;
	this.hideCh = menuHideCh;
	this.id = lastMenuId;
	lastMenuId++;
	this.parent = parentObj; 
	this.block = document.createElement("DIV");
	this.block.className = "blk-menu";
	this.block.style.position = "absolute";
	this.block.style.display = "none";
	this.block.style.zIndex = currZ;
	currZ++;
	this.block.id = "ms" + this.id;
	document.body.appendChild(this.block);
}

function showMenu(objVal, numVal){
	
	if (mReady){
		menuHideAll();
		/*objVal.className = "menu_item_selected";
		
		if ( document.getElementById(obj_left) )
			document.getElementById(obj_left).className='menu_sep_selected';
		
		if ( document.getElementById(obj_right) )
			document.getElementById(obj_right).className='menu_sep_selected';
		*/
		if ( numVal >= 0 && mSheets[numVal] ) {
			mSheets[numVal].show(getLeftPos(objVal)-4, getTopPos(objVal)-3,objVal);
			menuHideTimerReset();
		}
	}
}

function hideMenu(objVal, numVal){
	
	if (mReady){
		menuHideTimerSet();
	}
}

function getVisib(obj){
	var value = obj.style.visibility;
	if (!value) {
		if (obj.currentStyle) { // IE
			value = obj.currentStyle.visibility;
		} else
			value = '';
	}
	return value;
}

function getAbsolutePos ( el )
{
	var is_div;
	var r = { 'x':0, 'y':0 };
	obj = el;
	while( obj )
	{
		is_div = /^div$/i.test(obj.tagName);
		r.x = r.x + (obj.offsetLeft - ( (is_div && obj.scrollLeft)? obj.scrollLeft:0 ));
		r.y = r.y + (obj.offsetTop - ( (is_div && obj.scrollTop)? obj.scrollTop:0));
		obj = obj.offsetParent;
	}
	return r;
}

var elements = {};
function hideShowCovered ( element, v )
{
  if (!is_ie)
  {
    return;
  }

	if(''+elements[element.id]=='undefined')
	{
		elements[element.id] = v;
	}
	else if(elements[element.id] == v)
	{
		return;
	}
	elements[element.id] = v;

	var tags = new Array("applet", "iframe", "select");
	var el = element;

	var p 	= getAbsolutePos(el);
	var EX1 = p.x;
	var EX2 = el.offsetWidth + EX1;
	var EY1 = p.y;
	var EY2 = el.offsetHeight + EY1;

	var ar = [];
	var cc = null;

	for (var k = tags.length; k > 0; )
	{
		/*var*/
		var __ar = document.getElementsByTagName(tags[--k]);
		for( var __k = 0; __k< __ar.length;__k++)
		{
			ar[ar.length] = __ar[__k];
		}

		//var cc = null;
	}
		for (var i = ar.length; i > 0;)
		{
			cc = ar[--i];

			p = getAbsolutePos(cc);
			var CX1 = p.x;
			var CX2 = cc.offsetWidth + CX1;
			var CY1 = p.y;
			var CY2 = cc.offsetHeight + CY1;

			//if( ! (  ) )
			//{
				if ( ( cc.style.visibility == "hidden" ) || (CX1 > EX2) || (CX2 < EX1) || (CY1 > EY2) || (CY2 < EY1)   )
				{
					if (!cc.__msh_save_visibility)
					{
						cc.__msh_save_visibility = getVisib(cc);
					}
					fl = true;
					if(cc.__v_arr)
					{
						//{mine} "for in" construction is required here
						for(var j in cc.__v_arr)
						{
							if(j!=element.id && cc.__v_arr[j])
							{
								fl = false;
								break;
							}
						}
						cc.__v_arr[element.id] = false;
					}
					if(fl)cc.style.visibility = cc.__msh_save_visibility;
				}
				else
				{
					if (!cc.__msh_save_visibility)
					{
						cc.__msh_save_visibility = getVisib(cc);
					}
					cc.style.visibility = "hidden";
					if(!cc.__v_arr)
						cc.__v_arr = {};
					cc.__v_arr[element.id] = true;
				}
			//}
		}
	//}
}