JavaScript opening and ending scripts Options

[ShadowyBob]

Apologies if this has been asked before, but can't think of a suitable search keyword.

Can someone please explain what the purpose of the following at the start of an html page is:

CODE

<script language="JavaScript">
<!--

function SymError()
{
  return true;
}

window.onerror = SymError;

var SymRealWinOpen = window.open;

function SymWinOpen(url, name, attributes)
{
  return (new Object());
}

window.open = SymWinOpen;

//-->
</script>

and the following at the end of an html document:

CODE

<script language="JavaScript">
<!--
var SymRealOnLoad;
var SymRealOnUnload;

function SymOnUnload()
{
  window.open = SymWinOpen;
  if(SymRealOnUnload != null)
     SymRealOnUnload();
}

function SymOnLoad()
{
  if(SymRealOnLoad != null)
     SymRealOnLoad();
  window.open = SymRealWinOpen;
  SymRealOnUnload = window.onunload;
  window.onunload = SymOnUnload;
}

SymRealOnLoad = window.onload;
window.onload = SymOnLoad;

//-->
</script>

and why?

[pandy]

Sym is for Symantec.
http://service1.symantec.com/SUPPORT/nip.n...src=bar_sch_nam

and why?

God knows. Maybe you can configure your firewall to stop doing this. Don't know.

[ShadowyBob]

Thanks pandy. I've been seeing this on a lot of web page sources and wondered what I was missing out on.

Now I know it's my own NAV doing it! But the link does show how to get rid of it, if I prefer not to block unwanted adverts...

[stjepan]

It's Norton's pop-up blocker, Norton Firewall inserts that code. You can solve it by turning off the Norton Ad Blocking.