gistfile1.js

// Leaving foo declaration global, since I don't know
// whether you need it outside the scope of the closure.
var foo = function() {};

(function() {
  // The closure has private variables if declared
  // with "var ...".
  
  // Adding event utility functions for event handlers
  // by John Resig.
  var addEvent = function( obj, type, fn ) {
    if ( obj.attachEvent ) {
      obj['e'+type+fn] = fn;
      obj[type+fn] = function(){obj['e'+type+fn]( window.event );}
      obj.attachEvent( 'on'+type, obj[type+fn] );
    } else
      obj.addEventListener( type, fn, false );
  };
  var removeEvent = function( obj, type, fn ) {
    if ( obj.detachEvent ) {
      obj.detachEvent( 'on'+type, obj[type+fn] );
      obj[type+fn] = null;
    } else
      obj.removeEventListener( type, fn, false );
  };
  
  // Here's your code.
  var skeleton_init = function() {
    // call some foo() code
  };
  
  // This code makes skeleton_init run after the
  // document is done loading.
  addEvent(document, 'load', skeleton_init);
})();