function user_login(user, password)
{
	var cook = "user="+user+"|"+password;
	document.cookie = cook;
	location.href = "kontakt";
}

function user_logout()
{
	var cook = "user=";
	document.cookie = cook;
	window.location.reload();
}
function lightup(imageobject, opacity)
{
	if (navigator.appName.indexOf("Netscape")!=-1){if(parseInt(navigator.appVersion)>=5)
		{imageobject.style.MozOpacity=opacity/100;}}
	else if (navigator.appName.indexOf("Microsoft")!=-1){if(parseInt(navigator.appVersion)>=4)
		{imageobject.filters.alpha.opacity=opacity;}}
}
function show_img(value, art)
{
	var img = "new_img_"+value;
	if(art == 1){document.getElementById(img).style.visibility = "visible";}
	else if(art == 2){document.getElementById(img).style.visibility = "hidden";}
}
function dir(pl)
{
	location.href = pl;
}