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;
}

jQuery(document).ready(function(e){
    var cookie = readCookie("styleside");
    var title = cookie ? cookie : getPreferredStyleSheet();
    setActiveStyleSheet(title);
    
    jQuery('#setStyleSmall').click(function(e){
        e.preventDefault();
        setActiveStyleSheet('small');
    });
    
    jQuery('#setStyleMedium').click(function(e){
        e.preventDefault();
        setActiveStyleSheet('medium');
    });
    
    jQuery('#setStyleLarge').click(function(e){
        e.preventDefault();
        setActiveStyleSheet('large');
    });
    
});

jQuery(document).unload(function(e){
    var title = getActiveStyleSheet();
    createCookie("styleside", title, 365);
});