function tab(n) {
	var t,d;
	for(var i=0; i<4; i++) {
		t=document.getElementById("tab"+i);
		d=document.getElementById("tab"+i+"_content");
		
		if(i==n) {
			if(t) {
				t.style.backgroundImage = 'url(../img/tab_s.gif)';
				t.style.color="black";
			}
			d.style.display="block";
		}
		else {
			if(t) {
				t.style.backgroundImage = 'url(../img/tab.gif)';
				t.style.color="white";
			}
			d.style.display="none";
		}
	}
}


function attributeChanged(value) {
	var e = value.split("*");
	if(e[1]!="" && e[1]!=undefined) {
		if(document.getElementById("cena_eur")) document.getElementById("cena_eur").innerHTML = e[1];
		if(document.getElementById("cena_sk")) document.getElementById("cena_sk").innerHTML = e[2];

		if(document.getElementById("cena_eur_bez")) document.getElementById("cena_eur_bez").innerHTML = e[3];
		if(document.getElementById("cena_sk_bez")) document.getElementById("cena_sk_bez").innerHTML = e[4];
	}
	if(e[5] && document.getElementById("dostupnost")) document.getElementById("dostupnost").innerHTML = e[5];
}



function buy_item(item,amount,amount2) {
	if(amount%amount2 == 0) {
		; //OK
	}
	else {
		amountopr = amount2*Math.ceil(amount/amount2);
		alert("Nie je možné objednať "+amount+"ks (balené po "+amount2+").\nDávam preto do košíka "+amountopr+"ks.");
		amount = amountopr;
	}
	
	var color;
	if(document.getElementById("select_color"))
		color = document.getElementById("select_color").value;
	else
		color = "";
		
	var size;
	if(document.getElementById("select_size"))
		size = document.getElementById("select_size").value;
	else
		size = "";
		
	var version;
	if(document.getElementById("select_version"))
		version = document.getElementById("select_version").value;
	else
		version = "";
		
	var attribute;
	if(document.getElementById("select_attribute"))
		attribute = document.getElementById("select_attribute").value;
	else
		attribute = "";
	
	var attribute_name;
	if(document.getElementById("attribute_name"))
		attribute_name = document.getElementById("attribute_name").innerHTML;
	else
		attribute_name = "";
	
	var err="";
	if(document.getElementById("select_color") && color=="")
		err += ', Farba';
	if(document.getElementById("select_size") && size=="")
		err += ', Veľkosť';
	if(document.getElementById("select_version") && version=="")
		err += ', Prevedenie';
	if(document.getElementById("select_attribute") && attribute=="")
		err += ', '+attribute_name;	
	
	if(err=="") {
	//window.open('buy.php?mid='+item+'&amount='+amount+'&color='+color+'&size='+size,'editWindow','resizable=no,scrollbars=no,status=yes,width=730,height=550,menubar=no');
		window.location = 'index.php?action=buy&mid='+item+'&amount='+amount+'&color='+color+'&size='+size+'&version='+version+'&attribute='+attribute+'&attribute_name='+attribute_name+'&p=_cart';
	}
	else {
		alert("Vyplňte prosím všetky parametre objednávky: "+err.substr(2));
	}
}

function color_thumb_change(sel) {
	
	document.getElementById("color_value").innerHTML = document.getElementById("color_"+sel.value).innerHTML;

	for(var i=0; i!=-1; i++) {
		var img = document.getElementById("color_thumb_"+i);
		if(!img) break;
		
		if(i==sel.value)
			img.style.display="inline";
		else
			img.style.display="none";
	}
}