function na_open_window(name, url, left, top, width, height, toolbar, menubar, statusbar, scrollbar, resizable)
	{
	  toolbar_str = toolbar ? 'yes' : 'no';
	  menubar_str = menubar ? 'yes' : 'no';
	  statusbar_str = statusbar ? 'yes' : 'no';
	  scrollbar_str = scrollbar ? 'yes' : 'no';
	  resizable_str = resizable ? 'yes' : 'no';

	  cookie_str = document.cookie;
	  cookie_str.toString();

	  pos_start  = cookie_str.indexOf(name);
	  pos_end    = cookie_str.indexOf('=', pos_start);

	  cookie_name = cookie_str.substring(pos_start, pos_end);

	  pos_start  = cookie_str.indexOf(name);
	  pos_start  = cookie_str.indexOf('=', pos_start);
	  pos_end    = cookie_str.indexOf(';', pos_start);

	  if (pos_end <= 0) pos_end = cookie_str.length;
	  cookie_val = cookie_str.substring(pos_start + 1, pos_end);
	  if (cookie_name == name && cookie_val  == "done")
	    return;

	  window.open(url, name, 'left='+left+',top='+top+',width='+width+',height='+height+',toolbar='+toolbar_str+',menubar='+menubar_str+',status='+statusbar_str+',scrollbars='+scrollbar_str+',resizable='+resizable_str);
	}

	function na_preload_img()
	{
	  var img_list = na_preload_img.arguments;
	  if (document.preloadlist == null)
	    document.preloadlist = new Array();
	  var top = document.preloadlist.length;
	  for (var i=0; i < img_list.length-1; i++) {
	    document.preloadlist[top+i] = new Image;
	    document.preloadlist[top+i].src = img_list[i+1];
	  }
	}

	function na_change_img_src(name, nsdoc, rpath, preload)
	{
	  var img = eval((navigator.appName.indexOf('Netscape', 0) != -1) ? nsdoc+'.'+name : 'document.all.'+name);
	  if (name == '')
	    return;
	  if (img) {
	    img.altsrc = img.src;
	    img.src    = rpath;
	  }
	}

	function na_restore_img_src(name, nsdoc)
	{
	  var img = eval((navigator.appName.indexOf('Netscape', 0) != -1) ? nsdoc+'.'+name : 'document.all.'+name);
	  if (name == '')
	    return;
	  if (img && img.altsrc) {
	    img.src    = img.altsrc;
	    img.altsrc = null;
	  }
	}