/* funkce pro menu */
var clicked = "";
var gtype = ".png";
var gname;
var selstate = "_over";

function tr(b) {}

function turn_over(name) {
  if(document.images != null && clicked != name)
    document[name].src = document[name + "_over"].src;
}

function turn_off(name) {
  if(document.images != null && clicked != name)
    document[name].src = document[name + "_off"].src;
}

function reg(gname, name) {
  if (document.images) {
    document[name + "_off"] = new Image();
    document[name + "_off"].src = loc + gname + gtype;
    document[name + "_over"] = new Image();
    document[name + "_over"].src = loc + gname + "_over" + gtype;
  }
}

function evs(name) {
  return " onmouseover=\"turn_over('" + name + "')\" onmouseout=\"turn_off('" + name + "')\"";
}

function writeButton(url, name, w, h, alt, target) {
  gname = name;

  while(typeof(document[name]) != "undefined")
    name += "x";

  reg(gname, name);
  tr(true);

  alt = " alt=\"" + alt + "\"";

  if(target != "")
    target = " target=\"" + target + "\"";

  w = "; width: " + w + "px";
  h = "; height: " + h + "px";

  url = " href=\"" + url + "\"";

  document.write("<a style=\"font-size: 85%; color: black\" " + url + evs(name) + target + ">");
  document.write("<img style=\"vertical-align: top" + w + h + "\" src=\"" + loc + "/" + gname + gtype + "\" name=\"" + name + "\"" + alt + " border=\"0\" /></a>");
  tr(false);
}