var siteRoot;
        siteRoot = '';

        var szUserAgaent = navigator.userAgent;
        if (szUserAgaent.indexOf("Firefox") > -1) {
            var cssLink;
            cssLink = document.createElement('link');
            cssLink.type = 'text/css';
            cssLink.rel = 'stylesheet';
            cssLink.href = siteRoot + '/css/firefox.css';
            document.getElementsByTagName('head')[0].appendChild(cssLink);
        } else if (szUserAgaent.indexOf("MSIE 8.0") > -1) {
            
            var cssLink;
            cssLink = document.createElement('link');
            cssLink.type = 'text/css';
            cssLink.rel = 'stylesheet';
            cssLink.href = siteRoot + '/css/ie8.css';
            document.getElementsByTagName('head')[0].appendChild(cssLink);
            

        } else if (szUserAgaent.indexOf("MSIE 7.0") > -1) {
            var cssLink;
            cssLink = document.createElement('link');
            cssLink.type = 'text/css';
            cssLink.rel = 'stylesheet';
            cssLink.href = siteRoot + '/css/ie7.css';
            document.getElementsByTagName('head')[0].appendChild(cssLink);

        } else {
            //alert(szUserAgaent);
        }