function findPosX(obj){
		var curleft = 0;
		if (obj.offsetParent)
		{
			while (obj.offsetParent)
			{
				curleft += obj.offsetLeft
				obj = obj.offsetParent;
			}
		}
		else if (obj.x)
			curleft += obj.x;
		return curleft;
	}
	function findPosY(obj){
		var curtop = 0;
		if (obj.offsetParent)
		{
			while (obj.offsetParent)
			{
				curtop += obj.offsetTop
				obj = obj.offsetParent;
			}
		}
		else if (obj.y)
			curtop += obj.y;
		return curtop;
	}

	function pokazUkryj (co,takczynie) {
		if (takczynie == 1) {
			$(co).style.visibility = 'visible';
			$(co).style.display = 'block';
		}
		else {
			$(co).style.visibility = 'hidden';
			$(co).style.display = 'none';
		}
	}
	
	function ustawDiv (edest,esrc,xx,yy) {
		var obj = document.getElementById(edest);
		var obj2 = document.getElementById(esrc);
		var posnX = findPosX(obj2);
		var posnY = findPosY(obj2);
		obj.style.left = (posnX+xx)+'px';
		obj.style.top = (posnY +yy)+'px';
	}

	function $(id) {
		return document.getElementById(id)
	}	 

	// zwraca id tagow TAG o atrybucie rel=REL
	// return el1|el2|el3
	function getTagsWith (TAG, REL) {
		var elementy = '';
	   for (i=0; (ab=document.getElementsByTagName(TAG)[i]); i++) {
	   	if (rel=ab.getAttribute('rel')) {
				if (rel.indexOf(REL) != -1) elementy += ab.getAttribute('id')+'|';				
	   	}
	   }
		return elementy.substr(0,elementy.length-1);
	}
	
	// rozdzielczosc ekranu (prawie)
	function winSizeW () {
		winW = document.body.offsetWidth;
		return winW;
	}
	
	function winSizeH () {
  		winH = document.body.offsetHeight;
		return winH;
	}
	
// ciastka
	function createCookie (name,value,days) {
		if (days) {
			var date = new Date();
			date.setTime(date.getTime()+(days*24*60*60*1000));
			var expires = "; expires="+date.toGMTString();
		}
		else var expires = "";
		document.cookie = name+"="+value+expires+"; path=/";
	}	

	function readCookie (name) {
		var nameEQ = name + "=";
		var ca = document.cookie.split(';');
		for(var i=0;i < ca.length;i++) {
			var c = ca[i];
			while (c.charAt(0)==' ') c = c.substring(1,c.length);
			if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
		}
		return null;
	}

	function eraseCookie (name) {
		createCookie(name,"",-1);
	}	
	
	function ustawStyl (obiekt, styl, wartosc) {
		$(obiekt).style.styl = wartosc;
	}
	
	function showHint (obj,hint) {
		var gdzie = document.getElementById(obj);		
		if ((parseInt(document.getElementById(obj).style.left)+150) > winSizeW()) {
			ustawDiv ('hints',obj,-150,12);
		} else {
			ustawDiv ('hints',obj,16,16);		
		}
		$('hints').innerHTML = hint;
		$('hints').style.zIndex = '900';
		pokazUkryj ('hints',1);
	}