function setActiveStyleSheet(title) {
    if (document.getElementsByTagName) {
        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() {
    if (document.getElementsByTagName) {
        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() {
    if (document.getElementsByTagName) {
        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);
}

function swapSize(ver) {
    title = getActiveStyleSheet();
    if(ver == 'dec') {
        if (title == 'size1') {
            var txtDec = 'size1';
            document.images.minus.src = '/stc/images/navigation/minus_off.gif';
        } else if (title == 'size2') {
            var txtDec = 'size1';
            document.images.minus.src = '/stc/images/navigation/minus_off.gif';
        } else if (title == 'size3') {
            var txtDec = 'size2';
            document.images.minus.src = '/stc/images/navigation/minus_on.gif';
        } else if (title == 'size4') {
            var txtDec = 'size3';
            document.images.minus.src = '/stc/images/navigation/minus_on.gif';
        } else if (title == 'size5') {
            var txtDec = 'size4';
            document.images.minus.src = '/stc/images/navigation/minus_on.gif';
        } else {
            var txtDec = 'size1';
            document.images.minus.src = '/stc/images/navigation/minus_off.gif';
        }
        document.images.plus.src = '/stc/images/navigation/plus_on.gif';
        setActiveStyleSheet(txtDec);
    } else if(ver == 'inc') {
        if (title == 'size1') {
            var txtInc = 'size2';
            document.images.plus.src = '/stc/images/navigation/plus_on.gif';
        } else if (title == 'size2') {
            var txtInc = 'size3';
            document.images.plus.src = '/stc/images/navigation/plus_on.gif';
        } else if (title == 'size3') {
            var txtInc = 'size4';
            document.images.plus.src = '/stc/images/navigation/plus_on.gif';
        } else if (title == 'size4') {
            var txtInc = 'size5';
            document.images.plus.src = '/stc/images/navigation/plus_off.gif';
        } else if (title == 'size5') {
            var txtInc = 'size5';
            document.images.plus.src = '/stc/images/navigation/plus_off.gif';
        } else {
            var txtInc = 'size2';
            
            document.images.plus.src = '/stc/images/navigation/plus_on.gif';
        }
        document.images.minus.src = '/stc/images/navigation/minus_on.gif';
        setActiveStyleSheet(txtInc);
    }
}
function fontSize() {
    if (document.getElementsByTagName) {
        var cookie = readCookie("style");
        var title = cookie ? cookie : getPreferredStyleSheet();
        if (title == 'size1') {
            document.write('<a href="javascript:void(0)" title="Pienenn&auml;" class="xxx" onclick="swapSize(\'dec\'); return false;"><img src=\"/stc/images/navigation/minus_off.gif\" name=\"minus\" id=\"minus\" alt=\"Pienenn&auml;\" width=\"9\" height=\"9\"></a>');
        } else {
            document.write('<a href="javascript:void(0)" title="Pienenn&auml;" class="xxx" onclick="swapSize(\'dec\'); return false;"><img src=\"/stc/images/navigation/minus_on.gif\" name=\"minus\" id=\"minus\" alt=\"Pienenn&auml;\" width=\"9\" height=\"9\"></a>');
        }
        document.write(' <b>tekstikoko</b> ');
        if (title == 'size5') {
            document.write('<a href="javascript:void(0)" title="Suurenna" class="xxx" onclick="swapSize(\'inc\'); return false;"><img src=\"/stc/images/navigation/plus_off.gif\" name=\"plus\" id=\"plus\" alt=\"Suurenna\" width=\"9\" height=\"9\"></a>');
        } else {
            document.write('<a href="javascript:void(0)" title="Suurenna" class="xxx" onclick="swapSize(\'inc\'); return false;"><img src=\"/stc/images/navigation/plus_on.gif\" name=\"plus\" id=\"plus\" alt=\"Suurenna\" width=\"9\" height=\"9\"></a>');
        }
    }
}