[jQuery] Code not working in IE but is working in FF

[Althalos]

I posted something similarly before but I posted wrong code. This
time, everything is correct and I'll provide all the information
needed.

First of all, the URL to the site which is not working is
http://uf.ekdahlproduction.com/itsvintage2/

The error: In FF everything works perfectly but in IE it gets stuck on
1% and nothing happens whatsoever.

The code:
$(document).ready(function(){
    $("#slogan").css('opacity','0');
    var step = 10000;
   (function(){
      step -= 100;
      $("#percentage").text(100-step/100 + '%');
      if ( step > 0 )
         $("#logo").fadeTo(100,1-step/10000, arguments.callee);
         else window.location = "http://uf.ekdahlproduction.com/
itsvintage2/home.html";
      if ( step == 3500 )
        $("#slogan").fadeTo(3500,1);
   })();

});

Comments: I have noticed that it changes the opacity correctly, and
also sets the content of #percentage to 1%, therefore Jquery must be
working. Maybe this can be some kind of general javascript error?
Something that IE interprets differently than FF?

Thank you