[jQuery] Valore della proprietà non valido. jquery. js, Riga 12 Carattere 12721

[Lwangaman]

Can anyone help in deciphering this error message? I only get it in
Internet Explorer, it doesn't show up either in Firefox or in Chrome.

Here is the page that it occurs on: 
http://johnrdorazio.altervista.org/SitoFlatnukePersonale/?lang=en&mod=

The block that uses jquery and that is provoking the error is the one
in the right column of the page "News Headlines". I use jquery to
control the css and the mouseover (hover to be precise, talking
jquery) events in the scrollbar on the right, which controls the
direction and the speed of the marquee.

In IE the scrollbar (made up of 7 stacked cells in a nested table)
doesn't even finish rendering. So I suppose that the conflict could be
in there somewhere. Here is my jquery code:

$(document).ready(function(){

// your code here

$("td#upfastestbutton").css({"cursor":"default", "height":"14%",
"background-color":"cyan", "text-align":"center", "border-color":"
lightblue", "border-style":"inset inset none inset", "border-
width":"2px 2px 0px 2px"});
$("td.midbuttons").css({"cursor":"default", "height":"14%",
"background-color":"cyan", "text-align":"center", "border-color":"
lightblue", "border-style":"none inset none inset", "border-
width":"0px 2px 0px 2px"});
$("td#downfastestbutton").css({"cursor":"default", "height":"14%",
"background-color":"cyan", "text-align":"center", "border-color":"
lightblue", "border-style":"none inset inset inset", "border-
width":"0px 2px 2px 2px"});


$("td#upfastestbutton").hover(
   function(){
     $("marquee#MENU").trigger("start");
     $("marquee#MENU").attr({
       direction: "down", scrollamount: 4});
  },
   function(){
     $("marquee#MENU").attr({
       direction: "down", scrollamount: 4});
  }
)

$("td#upfasterbutton").hover(
   function(){
     $("marquee#MENU").trigger("start");
     $("marquee#MENU").attr({
       direction: "down", scrollamount: 2});
  },
   function(){
     $("marquee#MENU").attr({
       direction: "down", scrollamount: 2});
  }
)
$("td#upfastbutton").hover(
   function(){
     $("marquee#MENU").trigger("start");
     $("marquee#MENU").attr({
       direction: "down", scrollamount: 1});
  },
   function(){
     $("marquee#MENU").attr({
       direction: "down", scrollamount: 1});
  }
)


$("td#stopbutton").hover(
   function(){
     $("marquee#MENU").trigger("stop");
  },
   function(){
     $("marquee#MENU").trigger("stop");
  }
)

$("td#downfastbutton").hover(
   function(){
     $("marquee#MENU").trigger("start");
     $("#MENU").attr({
       direction: "up", scrollamount: 1});
  },
   function(){
     $("#MENU").attr({
       direction: "up", scrollAmount: 1});
  }
)

$("td#downfasterbutton").hover(
   function(){
     $("marquee#MENU").trigger("start");
     $("#MENU").attr({
       direction: "up", scrollAmount: 2});
  },
   function(){
     $("#MENU").attr({
       direction: "up", scrollAmount: 2});
  }
)

$("td#downfastestbutton").hover(
   function(){
     $("marquee#MENU").trigger("start");
     $("#MENU").attr({
       direction: "up", scrollAmount: 4});
  },
   function(){
     $("#MENU").attr({
       direction: "up", scrollAmount: 4});
  }
)

// your code ends here
 });