Fejl i JavaScript

Er der nogen der kan finde fejlen(e) i dette JacaScript:
<script language="JavaScript">
<!--
function namosw_list(parlayer, visible, width, height, font, size, fgColor, bgColor, indent, hbgColor) {

  this.additem = namosw_l_additem;
  this.addlist = namosw_l_addlist;
  this.build = namosw_l_build;
  this.rebuild = namosw_l_rebuild;
  this._writeList = namosw_l_writelist;
  this._showList = namosw_l_showlist;
  this._updateList = namosw_l_updatelist;
  this._updateParent = namosw_l_updateparent;
  this.lists = new Array(); // sublists
  this.items = new Array(); // layers
  this.types = new Array(); // type
  this.strs = new Array();  // content
  this.x = 0;
  this.y = 0;
  this.visible = visible;
  this.id = document.namosw_lists.length;
  this.i = indent;
  this.space = true;
  this.pid = 0;
  this.fontIntro = '<font color=' + fgColor;
  if (font != '') this.fontIntro += ' face=\"' + font + '\"';
  if (size != '')  this.fontIntro += ' size=' + size;
  this.fontIntro += '>';
  this.fontOutro = '</font>';
  this.width = width || 350;
  this.height = height || 22;
  this.parLayer = parlayer;
  this.built = false;
  this.shown = false;
  this.needsUpdate = false;
  this.needsRewrite = false;
  this.parent = null;
  this.l = 0;
  if (bgColor) this.bgColor = bgColor;
  else this.bgColor = null;
  if (hbgColor) this.hbgColor = hbgColor;
  else this.hbgColor = null;

  document.namosw_lists[document.namosw_lists.length] = this;
}

function namosw_l_setclip(layer, l, r, t, b) {
  if(navigator.appName == "Netscape") {
    layer.clip.left = l; layer.clip.right = r;
    layer.clip.top = t;  layer.clip.bottom = b;
  } else {
    layer.style.pixelWidth = r-l;
    layer.style.pixelHeight = b-t;
    layer.style.clip = "rect("+t+","+r+","+b+","+l+")";
  }
}

function namosw_l_updateparent(pid, l) {
  var layer;
  if(!l) l = 0;
  this.pid = pid;
  this.l = l;
  for(var i = 0; i < this.types.length; i++)
    if(this.types[i] == "list")
      this.lists[i]._updateParent(pid, l+1);
}

function namosw_l_expand(i) {
  document.namosw_lists[i].visible = !document.namosw_lists[i].visible;
  document.namosw_lists[document.namosw_lists[i].pid].rebuild();
}

function namosw_l_additem(str, url, frame) {
  var testLayer = false;

  if (navigator.appName.indexOf("Microsoft") != -1 || !this.parLayer) {
    testLayer = eval('document.all.namoswlistitem'+document.namosw_lists.lid);
  } else {
    testLayer = eval('this.parLayer.document.layers.namoswlistitem'+document.namosw_lists.lid);
  }
  if (testLayer) {
    layer = testLayer;
  } else {
    if(navigator.appName == "Netscape") {
      layer = this.parLayer ? new Layer(this.width, this.parLayer) :
        new Layer(this.width);
    } else {
      return;
    }
  }

  if (url)  layer.url  = url;
  if (frame) layer.frame = frame;
  this.items[this.items.length] = layer;
  this.types[this.types.length] = "item";
  this.strs[this.strs.length] = str;
  if (this.hbgColor) layer.hbgColor = this.hbgColor;
  if (this.bgColor)  layer.oBgColor = this.bgColor;
  namosw_l_set_layer_action(layer);
  document.namosw_lists.lid++;
}

function namosw_l_addlist(list, str, url, frame) {
  var testLayer = false;

  if (navigator.appName.indexOf("Microsoft") != -1 || !this.parLayer) {
    testLayer = eval('document.all.namoswlistitem'+document.namosw_lists.lid);
  } else {
    testLayer = eval('this.parLayer.document.layers.namoswlistitem'+document.namosw_lists.lid);
  }
  if (testLayer) {
    layer = testLayer;
  } else {
    if(navigator.appName == "Netscape") {
      layer = this.parLayer ? new Layer(this.width, this.parLayer) :
        new Layer(this.width);
    } else {
      return;
    }
  }
  if (url)  layer.url  = url;
  if (frame) layer.frame = frame;
  this.lists[this.items.length] = list;
  this.items[this.items.length] = layer;
  this.types[this.types.length] = "list";
  this.strs[this.strs.length]  = str;
  list.parent = this;
  if (this.hbgColor) layer.hbgColor = this.hbgColor;
  if (this.bgColor)  layer.oBgColor = this.bgColor;
  namosw_l_set_layer_action(layer);
  document.namosw_lists.lid++;
}

function namosw_init_list(top_layer)
{
  if(parseInt(navigator.appVersion) < 4) {
    alert("Sorry, a 4.0+ browser is required to view this demo.");
    return;
  }

  document.namosw_lists    = new Array();
  document.namosw_lists.lid = 0;

  var layer;
  if (navigator.appName == 'Netscape')
    layer = document.layers[top_layer];
  else
    layer = document.all[top_layer];

  l1 = new namosw_list(layer, true, 200, 22, 'Arial', '1', 'black', 'gray', 0, '#C2C2C2');
    l2 = new namosw_list(layer, false, 200, 17, 'Arial', '1', 'black', 'silver', 0, 'white');
    l2.additem('Udstyr 1', '', 'self');
    l2.additem('udstyr 2', '', 'self');
  l1.addlist(l2, 'udstyr', 'udstyr.html', 'self');
  l1.additem('Om Carso', 'om.html', 'self');

  l1.make(0, 14);
}

//-->
</script>

</head>

<body bgcolor="white" text="black" link="blue" vlink="purple" alink="red" onload="namosw_init_list('layer1');">

<p><div id="layer1" style="position:absolute; left:19px; top:14px; width:200px; height:200px; z-index:1; border-width:1px; border-style:none;">
    <div id="namoswlistitem0" style="position: absolute;"></div>
    <div id="namoswlistitem1" style="position: absolute;"></div>
    <div id="namoswlistitem2" style="position: absolute;"></div>
    <div id="namoswlistitem3" style="position: absolute;"></div>
    <div id="namoswlistitem4" style="position: absolute;"></div>
    <p>&nbsp;</p>
</div></p>
</body>

</html>