?what is this JS for?

[afroman]

I found this script on many sites - what does it do:

<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;

//-->

I'm a beginner at this.

 

[fiddler]

Are you using NIS? It seems to me that this code is added by Norton Internet Security. Basically it just supresses JavaScript errors caused by add blocking.