function expand(co, href) {
			 var exp = new Date();
			exp.setTime(exp.getTime() + (1000 * 60 * 60 * 24 * 30));

			if (document.getElementById(co).style.display == "block"){
				delCookie(co);
        		document.getElementById(co).style.display = "none";
        		window.location.reload();
    		}else{
				setCookie(co,'droped',exp);
        		document.getElementById(co).style.display = "block";
        		document.location.href = href;
		 	}
}

function setCookie(name, value, expires) {
	document.cookie = name + "=" + escape(value) + "; path=/" + ((expires == null) ? "" : "; expires=" + expires.toGMTString());
}

function delCookie(name) {
	var d = new Date();
	document.cookie = name + "=;expires=" + d.toGMTString() + "; path=/";
}
function show_sub(i){
	document.getElementById('opis').style.display = "none";
	document.getElementById('wiz').style.display = "none";
	document.getElementById('dane_techniczne').style.display = "none";
	if(i==0){
		document.getElementById('tytul').innerHTML = "";
		document.getElementById('opis').style.display = "block";
	}else if(i==1){
		document.getElementById('tytul').innerHTML = "- Właściwości i zastosowanie";
		document.getElementById('wiz').style.display = "block";
	}else{
		document.getElementById('tytul').innerHTML = "- Dane techniczne";
		document.getElementById('dane_techniczne').style.display = "block";
	}
}