Crisp's blog

function loadPrintStyle(cssFile)
{
    if ('onbeforeprint' in window)
    {
        window.onbeforeprint = function()
        {
            loadCSS(cssFile, 'print', true);
        }
    }
    else
    {
        loadCSS(cssFile, 'print');
    }
}

function loadCSS(fileName, media, sync)
{
    if (!loadCSS.loaded)
        loadCSS.loaded = {};

    if (!(fileName in loadCSS.loaded))
    {
        loadCSS.loaded[fileName] = true;

        // check if not already loaded fixed in head
        var links = document.getElementsByTagName('link'), i = links.length, style;
        while (i--)
        {
            if (links[i].href.indexOf(fileName) > -1)
                return false;
        }

        if (sync)
        {
            style = Ajax().sendRequest(
                getXmlHttpUrl('frontpage', 'stylesheet') + '&file=' + encodeURIComponent(fileName),
                {
                    method: 'GET',
                    type: 'text',
                    async: false
                }
            );

            return style && createStylesheet(fileName, style, media);
        }

        style = document.createElement('link');
        style.type = 'text/css';
        style.rel = 'stylesheet';
        style.media = media || 'screen,handheld,projection';
        style.href = fileName.indexOf('http://') != 0 ? ImgURL + 'x/' + (window.debug ? '' : 'min/') + fileName : fileName;
        getHead().appendChild(style);

        return style;
    }

    return false;
}

function createStylesheet(label, style, media, overwrite)
{
    var el, txt;

    if (!createStylesheet.elements)
        createStylesheet.elements = {};

    if ((el = createStylesheet.elements[label]))
    {
        if (!overwrite)
            return el;
    }
    else
    {
        el = document.createElement('style');
        el.type = 'text/css';
        el.media = media || 'screen,handheld,projection';
        getHead().appendChild(el);
        createStylesheet.elements[label] = el;
    }

    if (el.styleSheet)
    {
        el.styleSheet.cssText = style;
    }
    else
    {
        txt = document.createTextNode(style);
        if (el.firstChild)
            el.replaceChild(txt, el.firstChild);
        else
            el.appendChild(txt);
    }

    return el;
}