게시판 삽입시 나모로 만든 메뉴에서 자바스크립트 오류가 납니다....메뉴를 펼칠시 expand에서 오류가 나는데여....

원인을 잘 모르겠습니다.....

밑에는 나모에서 만든 펼침메뉴 소스입니다....

<script language="JavaScript">
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function namosw_list(parent, visible, width, height, font, size, fgColor, bgColor, indent, hbgColor, hfgColor) {
  this.additem = namosw_l_additem;
  this.addlist = namosw_l_addlist;
  this.make    = namosw_l_make;
  this.write   = namosw_l_write;
  this.show    = namosw_l_show;
  this.update  = namosw_l_update;
  this.updateparent = namosw_l_updateparent;
  this.items = new Array();
  this.id = document.namosw_lists.length;
  this.parent_id = 0;
  this.x = 0;
  this.y = 0;
  this.visible = visible;
  this.width    = width;
  this.height   = height;
  this.parent   = parent;
  this.indent = indent;
  this.fgColor = fgColor;
  this.hfgColor = hfgColor;
  this.bgColor  = bgColor;
  this.hbgColor = hbgColor;

  this.font_start = '';
  this.font_end   = '';

        
  this.font_start = '  if (size != '' && size.indexOf('pt', 0) == -1) this.font_start += ' size=' + size;
  this.font_start += '>';

  this.font_start += '<span';
  if (size.indexOf('pt', 0) != -1)
    this.font_start += ' style="font-size:' +size+ ';"';
  this.font_start += '>';

  this.font_end  = '</span>';
  this.font_end += '';

  this.made     = false;
  this.shown    = false;
  document.namosw_lists[document.namosw_lists.length] = this;
}

function namosw_l_setclip(layer, left, right, top, bottom) {
  if (navigator.appName.indexOf('Netscape', 0) != -1) {
    layer.clip.left   = left;
    layer.clip.right  = right;
    layer.clip.top    = top;  
    layer.clip.bottom = bottom;
  } else {    
    layer.style.pixelWidth  = right-left;
    layer.style.pixelHeight = bottom-top ;
    layer.style.clip  = "rect(" + top + "," + right + "," + bottom + "," + left + ")";
  }
}

function namosw_l_write() {
  var layer, clip, str;
  for(var i = 0; i < this.items.length; i++) {
    layer = this.items[i];
    if (navigator.appName.indexOf('Netscape', 0) != -1)
      layer.visibility = "hidden";
    else
      layer.style.visibility = "hidden";
    str = "";

    str += "<table width="+this.width+" nowrap border='0' cellpadding='0' cellspacing='0' style='border-bottom:1px solid white;'><tr>";
    if (0 < this.indent) str += "<td width="+this.indent+" nowrap> </td>";
    if (layer.type == 'list') {
      str += "<td width=15  valign='middle' nowrap><a";
      if (navigator.appName.indexOf('Netscape', 0) != -1) str += " href="javascript:void(0);"";
      else                                                str += " style="cursor:hand;"";
      str += " onclick="namosw_l_expand("+layer.list.id+");"></td>";
    } else {
      str += "<td width=15 nowrap> </td>";
    }
    str += "<td height="+(this.height-3)+" width="+(this.width-15-this.indent)+" valign='middle' align='left'>";

    if (layer.url)       str += "";
    if (this.font_start) str += this.font_start;
    str += layer.text;
    if (this.font_end) str += this.font_end;
    if (layer.url)       str += "";
    str += "</td><tr height='1'><td colspan='2'></td></tr></table>";

    str = str.replace("span", "span id='namoswlistspan" + layer.lid + "'");

    if (navigator.appName.indexOf('Netscape', 0) != -1) {
      layer.document.writeln(str);
      layer.document.close();
    } else {
      layer.innerHTML = str;
      layer.span = document.all['namoswlistspan'+layer.lid];
    }
    if (layer.type == 'list' && layer.list.visible)
      this.items[i].list.write();
  }
  this.made = true;
}

function namosw_l_show() {
  var layer;
  for(var i = 0; i < this.items.length; i++) {
    layer = this.items[i];
    namosw_l_setclip(layer, 0, this.width, 0, this.height);
    if (navigator.appName.indexOf('Netscape', 0) != -1) {
      if (layer.oBgColor) layer.document.bgColor = layer.oBgColor;
      else layer.document.bgColor = this.bgColor;
    } else {
      if (layer.oBgColor) layer.style.backgroundColor = layer.oBgColor;
      else layer.style.backgroundColor = this.bgColor;
    }
    if (layer.type == 'list' && layer.list.visible)
      layer.list.show();
  }
  this.shown = true;
}

function namosw_l_update(parent_visible, x, y) {
  var top = y, layer, list;
  for(var i = 0; i < this.items.length; i++) {
    layer = this.items[i];
    list  = layer.list;
    if (this.visible && parent_visible) {
      if (navigator.appName.indexOf('Netscape', 0) != -1) {
        layer.visibility = "visible";
        layer.top = top;
        layer.left = x;
      } else {
        layer.style.visibility = "visible";
        layer.style.pixelTop   = top;
        layer.style.pixelLeft  = x;        
//        if (layer.url) layer.style.cursor = "hand";
      }
      top += this.height;
    } else {
      if (navigator.appName.indexOf('Netscape', 0) != -1) layer.visibility = "hidden";
      else layer.style.visibility = "hidden";
    }
    if (layer.type == 'list') {
      if (list.visible) {
        if (!list.made)  list.write();
        if (!list.shown) list.show();
        if (navigator.appName.indexOf('Netscape', 0) != -1) layer.document.images[0].src = "collapsed.gif";
        else eval('document.images._img'+list.id+'.src = "collapsed.gif"');
      } else {
        if (navigator.appName.indexOf('Netscape', 0) != -1) layer.document.images[0].src = "expanded.gif";
        else eval('document.images._img'+list.id+'.src = "expanded.gif"');
      }
      if (list.made)
        top = list.update(this.visible && parent_visible, x, top);
    }
  }
  return top;
}

function namosw_l_updateparent(parent_id) {
  this.parent_id = parent_id;
  for(var i = 0; i < this.items.length; i++)
    if (this.items[i].type == 'list')
      this.items[i].list.updateparent(parent_id);
}

function namosw_l_expand(i) {
  document.namosw_lists[i].visible = !document.namosw_lists[i].visible;
  list = document.namosw_lists[document.namosw_lists[i].parent_id];
  list.update(true, list.x, list.y);
}

function namosw_l_make(x, y) {
  this.updateparent(this.id);
  this.write();
  this.show();
  this.update(true, x, y);
  this.x = x;
  this.y = y;
}

function namosw_l_additem(text, url, frame) {
  var layer = null;
  if (navigator.appName.indexOf('Netscape', 0) != -1 && this.parent)
    layer = eval('this.parent.document.layers.namoswlistitem'+document.namosw_lists.lid);
  else
    layer = eval('document.all.namoswlistitem'+document.namosw_lists.lid);
  if (layer == null) {
    if (navigator.appName.indexOf('+ '+ 'Netscape', 0) != -1)
      layer = this.parent ? new Layer(this.width, this.parent) : new Layer(this.width);
  }
  if (layer == null) return;

  if (url)   layer.url   = url;
  if (frame) {
    if (frame.indexOf('parent.') != 0)
      layer.frame = "_" + frame;
    else
      layer.frame = frame.substring(7, frame.length);
  }
  layer.type = 'item';
  layer.text = text;
  layer.lid  = document.namosw_lists.lid;
  this.items[this.items.length] = layer;
  layer.hbgColor = this.hbgColor;
  layer.oBgColor = this.bgColor;
  layer.fgColor = this.fgColor;
  layer.hfgColor = this.hfgColor;
  layer.border = 1;
  if (layer.captureEvents)
    layer.captureEvents(Event.MOUSEOVER|Event.MOUSEOUT|Event.MOUSEUP);
  layer.onmouseover = namosw_l_onmouseover;
  layer.onmouseout  = namosw_l_onmouseout;
//  layer.onmouseup   = namosw_l_onmouseup;
  document.namosw_lists.lid++;
}

function namosw_l_addlist(list, text, url, frame) {
  var layer = null;

  if (navigator.appName.indexOf('Netscape', 0) != -1 && this.parent)
    layer = eval('this.parent.document.layers.namoswlistitem'+document.namosw_lists.lid);
  else
    layer = eval('document.all.namoswlistitem'+document.namosw_lists.lid);
  if (layer == null) {
    if (navigator.appName.indexOf('Netscape', 0) != -1)
      layer = this.parent ? new Layer(this.width, this.parent) : new Layer(this.width);
  }
  if (layer == null) return;

  if (url)   layer.url   = url;
  if (frame) {
    if (frame.indexOf('parent.'+ ') != 0)
      layer.frame = "_" + frame;
    else
      layer.frame = frame.substring(7, frame.length);
  }
  layer.list = list;
  layer.type = 'list';
  layer.text = text;
  layer.lid  = document.namosw_lists.lid;
  this.items[this.items.length] = layer;
  list.parent = this;
  layer.hbgColor = this.hbgColor;
  layer.oBgColor = this.bgColor;
  layer.fgColor = this.fgColor;
  layer.hfgColor = this.hfgColor;
  if (layer.captureEvents)
    layer.captureEvents(Event.MOUSEOVER|Event.MOUSEOUT|Event.MOUSEUP);
  layer.onmouseover = namosw_l_onmouseover;
  layer.onmouseout  = namosw_l_onmouseout;
//  layer.onmouseup   = namosw_l_onmouseup;
  document.namosw_lists.lid++;
}

function namosw_l_onmouseover()
{
  if (navigator.appName.indexOf('Netscape', 0) != -1) {
    if (this.hbgColor)
      this.bgColor = this.hbgColor;
  } else {
    if (this.hbgColor) this.style.backgroundColor = this.hbgColor;
    if (this.hfgColor) this.span.style.color = this.hfgColor;
  }
  if (this.url) self.status = this.url;
}

function namosw_l_onmouseout()
{
  if (navigator.appName.indexOf('Netscape', 0) != -1) {
    this.bgColor = this.oBgColor;
  } else  {
    this.style.backgroundColor = this.oBgColor;
    this.span.style.color = this.fgColor;
  }
  if (this.url) self.status = '';
}

function namosw_l_onmouseup()
{
  if (this.url) {
    if (this.frame == 'blank') {
      window.open(this.url, 'win1');
    } else {
      var frame_obj;
      if ((frame_obj = eval(this.frame)) != null)
        frame_obj.location = this.url;
    }
  }
}


function namosw_init_list(top_layer)
{
  if (parseInt(navigator.appVersion) < 4)
    return;
  if (top_layer == '')
    return;

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

  var is_ns4 = navigator.appName.indexOf('Netscape', 0) != -1 && !document.getElementById;
  var is_ns6 = navigator.appName.indexOf('Netscape', 0) != -1 && document.getElementById;

  var layer;
  if (is_ns4)      layer = document.layers[top_layer];  
  else if (is_ns6) layer = document.getElementById(top_layer);
  else             layer = document.all[top_layer];


  var string = "";
  for (i = 0; i < 13; i++) {
    string = string + "";
  }
  layer.innerHTML += string;

  l1 = new namosw_list(layer, true, 150, 25, 'Arial', '8pt', 'white', '#3A9DD0', 0, '#3482A9');
  l1.additem('About KMOLD', '/kmold/about_kmold/kmold_concept.php', 'self');
    l2 = new namosw_list(layer, false, 150, 20, 'Arial', '8pt', 'white', '#7DB3D0', 10, '#6A97C0');
    l2.additem('Architecture', '/KMOLD/KMOLD_Sys/Acrchitecture/kmold_arch.php', 'self');
    l2.additem('IT Solution', '/KMOLD/KMOLD_Sys/IT_Solution/kmold_it.php', 'self');
    l2.additem('Design Solution', '/KMOLD/KMOLD_Sys/Design_Solution/kmold_ramdes.php', 'self');
      l3 = new namosw_list(layer, false, 150, 20, 'Arial', '8pt', '#2A6DA8'+ ', '#A5CFE7', 25, 'white');
      l3.additem('NCM', '/kmold/KMOLD_Sys/Mfg_Solution/NCM/kmold_ncm.php', 'self');
      l3.additem('EDM', '/kmold/KMOLD_Sys/Mfg_Solution/edm/kmold_edm.php', 'self');
      l3.additem('Gundrill', '/KMOLD/KMOLD_Sys/Mfg_Solution/Gundrill/kmold_gundrill.php', 'self');
      l3.additem('Wire Cut', '/KMOLD/KMOLD_Sys/Mfg_Solution/wire_cut/kmold_wire.php', 'self');
    l2.addlist(l3, 'Mfg. Solution', '', 'self');
  l1.addlist(l2, 'KMOLD System', '', 'self');
  l1.additem('User Community', '/zb41pl8/bbs/zboard.php?id=User_Community', 'self');
  l1.additem('KMOLD News', '/zb41pl8/bbs/zboard.php?id=Kmold_News', 'self');

  l1.make(0, 14);
}

function namosw_ns_resize()
{
  window.history.go(0);
}

// -->
</script>

</head>
<body OnLoad="namosw_init_list('layer1');" OnResize="namosw_ns_resize();" bgcolor="#3A9DD0">



위에 빨간색 부분쪽이 잘못된거 같은데...제로보드와 무슨 충돌이 나길래 오류가 나는지 확인 좀 부탁드립니다..