gistfile1.js

function doStuff(doc) {
  // must be run when document/resources are fully loaded
  $("body",doc).css("background","red");
};
jetpack.tabs.onReady(function(doc){  
  $(this).load(function(){doStuff(doc);});
  if (doc.readyState == "complete") {
    doStuff(doc);
  }
});