Add a `title` Attribute to Wufoo's <iframe> and remove superflous presentational attributes.

wufoo-remove-iframe-attributes.js

// --- Add a `title` Attribute to Wufoo's <iframe> and remove ---
// --- superflous presentational attributes ---
// We have to wait until the <iframe> is built to add stuff to it;
// hence, the reason for using the MutationObserver API. It listens
// for when the node is finished building, then we can add & remove stuff.
var wufooOptions = {
  wufooId: 'wufoo-xilwg7v0n5ncc2', // The id of the <div> Wufoo gives you for their JS form embed
  titleContent: 'Cast your vote by selecting a hat.' // The content for your title attribute
};

var observer = new MutationObserver(function(mutations) {
  mutations.forEach(function(mutation, index) {
    if (index > 0){
      // stops further observing of changes
      observer.disconnect();
    } else {
      var wufooIframeId = mutation.addedNodes[0].id;
      var wufooIframe = document.getElementById(wufooIframeId);
      wufooIframe.setAttribute('title', wufooOptions.titleContent);

      // Remove attributes listed in the following array:
      var removeTheseAttributes = ['frameborder','style','scrolling','allowtransparency'];
      removeTheseAttributes.forEach(function(attr,index){
        wufooIframe.removeAttribute(attr);
      });
    }
  });
  observer.disconnect();
});

// Listen to all changes to the child node of the <div> supplied by Wufoo
var targetNode = document.getElementById(wufooOptions.wufooId);
observer.observe(targetNode, { childList: true });