Generic JavaScript and CSS file loader

gistfile1.js

var fileLoader= {
    require:function(s) {
        try{
            // inserting via DOM fails in Safari 2.0, so brute force approach
            if(s.type == "text/javascript") {
                document.write('<script type="text/javascript" src="'+s.url+'"><\/script>');
            } else {
                document.write('<link rel="stylesheet" href="'+ s.url +'" />');
            }
        } catch(e) {
            // for xhtml+xml served content, fall back to DOM methods
            if(s.type == "text/javascript") {
                var script = document.createElement('script');
                script.type = 'text/javascript';
                script.src = s.url;
                document.getElementsByTagName('head')[0].appendChild(script);
            } else {
                var style = document.createElement('link');
                style.rel = 'stylesheet';
                style.href = s.url;
                document.getElementsByTagName('head')[0].appendChild(style);
            }
        }
    }
};