yoink

function yoink(complete) {

  var all={
    scripts: [],
    stylesheets: []
  }

  function downloadResources(urls, onComplete) {

    var resources = [];

   (function inlineResource(index) {

      if (index==urls.length) {
        onComplete(resources);
        return;
      }

      var xhr = new XMLHttpRequest();
      xhr.open("GET", urls[index], true);
      xhr.onreadystatechange = function() {
        if (xhr.readyState!=4) return;
        if (xhr.status==200) resources.push(xhr.responseText);
        inlineResource(index+1);
      }
      xhr.send();
    })(0);

  }

  var scripts = document.getElementsByTagName("script");
  var scriptSources = [];
  for (var i=0; i<scripts.length; i++) { 
    if (scripts[i].src) scriptSources.push(scripts[i].src); // remote
    else all.scripts.push(scripts[i].innerHTML); // inline
  };
  downloadResources(scriptSources, function(resources) {
    all.scripts = all.scripts.concat(resources);

    var styles = document.getElementsByTagName("styles");
    for (var i=0; i<styles.length; i++) { all.stylesheets.push(styles[i]); };
    var allElements = document.getElementsByTagName("*");
    for (var i=0; i<allElements.length; i++) {
      var inlineStyle = allElements[i].getAttribute("style")
      if (inlineStyle) all.stylesheets.push(inlineStyle);
    };
    var links = document.getElementsByTagName("link");
    var cssHrefs = [];
    for (var i=0; i<links.length; i++) {
      if (links[i].type=="text/css") cssHrefs.push(links[i].href);
    };
    downloadResources(cssHrefs, function(resources) {
      all.stylesheets = all.stylesheets.concat(resources);
      complete(all);
    });

  });

}

/*
yoink(function(all) {
  console.log("scripts", all.scripts); // string array
  console.log("stylesheets", all.stylesheets); // string array
});
*/