Problem with style switcher (CSS + Jquery)

Hi
 I have a problem with the print functionnality on my web site.
I use a style switcher to change the font size of my pages:
> jquery 1.2.6 with management of the cookies
 
In my Css, I use the option "@media print" to manage what I want or not to be print. All my  classes are placed at the end of the files main.css (normal size) and larger.css (larger size)

 With the normal size, I do not have printing problems with these browser :
 > IE6, IE 7, IE8
 > Opera
 > Chrome
 > Firefox 3.5
 > Safari 4

My problem: With larger size, print is correct for all the navigators except Internet explorer. it seems that Internet explorer do not use at all my larger css.

any idea?

thanks.

Im using this code, which is setting the default style sheet Ive defined in the master page
 
In the header of the master page:
                <!-- default stylesheet - shown originally-->
                <link rel="stylesheet" type="text/css" href="/Style Library/Main.css" title="default" />
                               
                
                <!-- alternate CSS used to manage a bigger font-size -->
                <link rel="alternate stylesheet" type="text/css" href="/Style Library/larger.css" title="larger" /> 
 
 
And :
 
<div id="StyleSwitcher">
                <a href="/" onclick='setActiveStyleSheet("default"); return false;' id="Adefault" title="Normal font size">A</a> - 
                <a href="/" onclick='setActiveStyleSheet("larger"); return false;' id="Alarger" title="Larger font size"> A<sup>+</sup></a> 
</div>
 
The javascript :
 
The code : 
 
 
 
function setActiveStyleSheet(title) {
  var i, a, main;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title")) {
      a.disabled = true;
      if(a.getAttribute("title") == title) a.disabled = false;
    }
  }
}
 
function getActiveStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title") && !a.disabled) return a.getAttribute("title");
  }
  return null;
}
 
function getPreferredStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1
       && a.getAttribute("rel").indexOf("alt") == -1
       && a.getAttribute("title")
       ) return a.getAttribute("title");
  }
  return null;
}
 
function createCookie(name,value,days) {
  if (days) {
    var date = new Date();
    date.setTime(date.getTime()+(days*24*60*60*1000));
    var expires = "; expires="+date.toGMTString();
  }
  else expires = "";
  document.cookie = name+"="+value+expires+"; path=/";
}
 
function readCookie(name) {
  var nameEQ = name + "=";
  var ca = document.cookie.split(';');
  for(var i=0;i < ca.length;i++) {
    var c = ca[i];
    while (c.charAt(0)==' ') c = c.substring(1,c.length);
    if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
  }
  return null;
}
 
window.onload = function(e) {
  var cookie = readCookie("style");
  var title = cookie ? cookie : getPreferredStyleSheet();
  setActiveStyleSheet(title);
}
 
window.onunload = function(e) {
  var title = getActiveStyleSheet();
  createCookie("style", title, 365);
}
 
var cookie = readCookie("style");
var title = cookie ? cookie : getPreferredStyleSheet();
setActiveStyleSheet(title);

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