var itdScripter = {
  Version: '1.0',
  require: function(libraryName) {
    // inserting via DOM fails in Safari 2.0, so brute force approach
    document.write('<script type="text/javascript" src="'+libraryName+'"></script>');
  },
  load: function() {
    if((typeof Prototype=='undefined') ||
      parseFloat(Prototype.Version.split(".")[0] + "." +
                 Prototype.Version.split(".")[1]) < 1.0)
      throw("it requires the Prototype JavaScript framework >= 1.0.0");

    $A(document.getElementsByTagName("script")).findAll( function(s) {
      return (s.src && s.src.match(/itdscripter\.js(\?.*)?$/))
    }).each( function(s) {
      var path = s.src.replace(/itdscripter\.js(\?.*)?$/,'');
      var includes = s.src.match(/\?.*load=([a-z,]*)/);
      (includes ? includes[1] : 'effects,dragdrop').split(',').each(
       function(include) { itdScripter.require(path+include+'.js') });
    });
  }
}
itdScripter.load();