Question

Right now I’m getting this strange error from IE which is basically

'null' is null or not an object

The line number it gives is completely off so I don’t put much credit into that however I think I narrowed it down to where it’s coming from.

function openSong(songlink){
     $('#smallbox').slideDown();
     requestCompleteSong('<tr><td>'+songlink+'</td></tr>');
  }

The code above doesn’t produce any errors from IE, however when I do an AJAX GET request using jQuery then it seems to throw this error

function openSong(songlink){
     $('#smallbox').slideDown();
     $.get("getSong.php?fake="+makeid(),{ id: songlink },requestCompleteSong);
  }

‘songlink’ definitely isn’t null because the first function I posted works fine. Here is makeid().

function makeid()
{
  var text = "";
  var possible = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";

  for( var i=0; i < 5; i++ )
    text += possible.charAt(Math.floor(Math.random() * possible.length));

  return text;
}

Can anybody see why IE is throwing this error?

Answer 1

This is indeed one of the most generic Internet Explorer JavaScript errors. It means that you are invoking methods of some object which is null. While I cannot tell which part of your code is causing this error I can suggest a way to find it out. You can use the developer tools to debug your code – just put a debugger statement in your code:

function openSong(songlink){
 debugger;
 // rest of the code
}

Then enable debugging from the IE developer toolbar and refresh your page.