Downloading JavaScript Files in Parallel. Script by: Rakesh Pai http://blog.rakeshpai.me/2009/03/downloading-javascript-files-in.html

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<script type="text/javascript">
    (function() {
        var s = [
            "/javascripts/script1.js",
            "/javascripts/script2.js",
            "/javascripts/script3.js",
            "/javascripts/script4.js",
            "/javascripts/script5.js"
        ];

        var sc = "script", tp = "text/javascript", sa = "setAttribute", doc = document, ua = window.navigator.userAgent;
        for(var i=0, l=s.length; i<l; ++i) {
            if(ua.indexOf("Firefox")!==-1 || ua.indexOf("Opera")!==-1) {
                var t=doc.createElement(sc);
                t[sa]("src", s[i]);
                t[sa]("type", tp);
                doc.getElementsByTagName("head")[0].appendChild(t);
            } else {
                doc.writeln("<" + sc + " type=\"" + tp + "\" src=\"" + s[i] + "\"></" + sc + ">");
            }
        }
    })();
</script>