Javascript cookies only work in FF

Question

I've written this code to set the font sizes in a joomla site and store them in a cookie, problem is it only works in FF, i've tried several different solutions and I just can't to get it right. This is the code:
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;
function getFontSize(){
    var size = readCookie("fontsize");
    if (size== null) return "normal"; else return size;
(function($) {
function setFontSize (size)
    if (size == "small")
        $("#contentWrapper").css("font-size", "10px");
        $("#contentWrapper h1").css("font-size","14px");
        $("#contentWrapper h2").css("font-size", "12px");
    if (size == "big")
        $("#contentWrapper").css("font-size","14px");
        $("#contentWrapper h2").css("font-size","16px");
        $("#contentWrapper h1").css("font-size","18px");
    if (size =="normal")
        $("#contentWrapper").css("font-size","12px");
        $("#contentWrapper h2").css("font-size","14px");
        $("#contentWrapper h1").css("font-size","16px");
    document.cookie="fontsize=" + size + ";max-age=" + (60*60*24*365) ;
    $(document).ready(function(){
        var size = getFontSize();
        setFontSize (size);
    $('a#smallFont').click(function(e){
        e.preventDefault();
        setFontSize('small');
        return false;
    $('a#normalFont').click(function(e){
        e.preventDefault();
        setFontSize('normal');
        return false;
    $('a#bigFont').click(function(e){
        e.preventDefault();
        setFontSize('big');
        return false;
    }); // document ready
})(jQuery)
Does somebody know what's going wrong here in the other browsers beside FF?

Answer 1

Have you looked for other  scripts with similiar functionality from http://jquery.com/
where the credit is only needed in the js file itself.  I too, wouldn't be comfortable linking to another site just to use a script - what happens if their site goes down or they close shop - you're then left with an element on your page that doesn't work.....