function SDMenu(id) {
	if (!document.getElementById || !document.getElementsByTagName)
		return false;
	this.menu = document.getElementById(id);	
  this.submenus = this.menu.getElementsByTagName("div");
  this.remember = true;
	this.speed = 2;
	this.markCurrent = true;
	this.oneSmOnly = false;
	this.odejmijOffset = 0;
	this.rozmiarPoczatkowy;
}
SDMenu.prototype.init = function(offset) {  
	var mainInstance = this;
	this.odejmijOffset = offset;
	
	var pozycje = this.menu.getElementsByTagName("span");
	for (var i = 0; i < pozycje.length; i++){
	  pozycje[i].onmouseout = function(){
      //this.style.color = "white";
  	} 
    pozycje[i].onmouseover = function(){   
      //this.style.color = "#55F000";
  	}
	}
	
	for (var i = 0; i < this.submenus.length; i++)
	  this.submenus[i].className = 'collapsed';
	  
	for (var i = 0; i < this.submenus.length; i++)
    if(this.submenus[i].getElementsByTagName("span").length >0 )
		this.submenus[i].getElementsByTagName("span")[0].onclick = function() {		  
			mainInstance.toggleMenu(this,this.parentNode);
		};	
	if (this.markCurrent) {
		var links = this.menu.getElementsByTagName("a");
		for (var i = 0; i < links.length; i++)
			if (links[i].href == document.location.href) {
				links[i].className = "current";
				break;
			}
	}
	if (this.remember) {
		var regex = new RegExp("sdmenu_" + encodeURIComponent(this.menu.id) + "=([01]+)");
		var match = regex.exec(document.cookie);
		if (match) {
			var states = match[1].split("");
			for (var i = 0; i < states.length; i++)
				this.submenus[i].className = (states[i] == 0 ? "collapsed" : "");
		}
	}
  
	
};
SDMenu.prototype.toggleMenu = function(tmp,submenu) {
	if (submenu.className == "collapsed"){
	  tmp.style.background= "none";
		this.expandMenu(submenu);
	}
	else{	  
		this.collapseMenu(submenu, tmp);		
	}
};
SDMenu.prototype.expandMenu = function(submenu) {
if(submenu.getElementsByTagName("span").length >0){
  var fullHeight = submenu.getElementsByTagName("span")[0].offsetHeight;
	var links = submenu.getElementsByTagName("a");
	for (var i = 0; i < links.length; i++)
		fullHeight += links[i].offsetHeight;
	//var moveBy = Math.round(this.speed * links.length);
  var moveBy = 6;
	
	var mainInstance = this;
	var intId = setInterval(function() {
		var curHeight = submenu.offsetHeight;
		var newHeight = curHeight + moveBy;
		if (newHeight < fullHeight){
			submenu.style.height = newHeight + "px";
			mainInstance.wyswietlanie();
		}
		else {
			clearInterval(intId);
			submenu.style.height = "";
			submenu.className = "";
			mainInstance.memorize();
			mainInstance.wyswietlanie();
		}
	}, 1);
	this.collapseOthers(submenu);	
}};
SDMenu.prototype.collapseMenu = function(submenu, tmp) {
	var minHeight = submenu.getElementsByTagName("span")[0].offsetHeight;
	//var moveBy = Math.round(this.speed * submenu.getElementsByTagName("a").length);
	var moveBy = 6;
	
	var mainInstance = this;
	var intId = setInterval(function() {
		var curHeight = submenu.offsetHeight;
		var newHeight = curHeight - moveBy;
		//alert(curHeight - moveBy);
		if (newHeight > minHeight){
			submenu.style.height = newHeight + "px";
      mainInstance.wyswietlanie();			
		}
		else {
			clearInterval(intId);
			submenu.style.height = "";
			submenu.className = "collapsed";
			mainInstance.memorize();
			if(navigator.appVersion.indexOf("MSIE") != -1)
		    //tmp.style.background= "url(templates/images/menu_line.jpg) no-repeat 30px 25px";
		  mainInstance.wyswietlanie();
		}
	}, 1);
};
SDMenu.prototype.collapseOthers = function(submenu) {
	if (this.oneSmOnly) {
		for (var i = 0; i < this.submenus.length; i++)
			if (submenu.id != "kla" && this.submenus[i] != submenu && this.submenus[i].className != "collapsed")
				this.collapseMenu(this.submenus[i]);
	}
};
SDMenu.prototype.expandAll = function() {
	var oldOneSmOnly = this.oneSmOnly;
	this.oneSmOnly = false;
	for (var i = 0; i < this.submenus.length; i++)
		if (this.submenus[i].className == "collapsed")
			this.expandMenu(this.submenus[i]);
	this.oneSmOnly = oldOneSmOnly;
};
SDMenu.prototype.collapseAll = function() {
	for (var i = 0; i < this.submenus.length; i++)
		if (this.submenus[i].className != "collapsed")
			this.collapseMenu(this.submenus[i]);
};
SDMenu.prototype.memorize = function() {
	if (this.remember) {
		var states = new Array();
		for (var i = 0; i < this.submenus.length; i++)
			states.push(this.submenus[i].className == "collapsed" ? 0 : 1);
		var d = new Date();
		d.setTime(d.getTime() + (30 * 24 * 60 * 60 * 1000));
		document.cookie = "sdmenu_" + encodeURIComponent(this.menu.id) + "=" + states.join("") + "; expires=" + d.toGMTString() + "; path=/";
	}	
};
SDMenu.prototype.wyswietlanie = function() {
  var mid = document.getElementById('main');
  if(mid.offsetHeight<document.getElementById('lewa').offsetHeight)
    mid.style.height = document.getElementById('lewa').offsetHeight+"px";//-76-this.odejmijOffset+"px";
  else if(this.rozmiarPoczatkowy<mid.offsetHeight)
    mid.style.height = document.getElementById('lewa').offsetHeight+"px";//-76-this.odejmijOffset+"px";
};