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问题:

I have the following javascript being called to request a focus when page is loaded.

This code works 100% OK with Firefox and IE7, but Chrome and Safari do not seem to move the focus at all. How to make it work with all browsers?

 document.getElementById("MyFlashFile").focus();

回答1:

Ensure this code is being called after the entire page has been rendered. It's probably being called above the HTML it refers to, so the element will not exist yet.

Various JavaScript frameworks have utilities to tell you when the DOM is ready.

回答2:

It took me hours searching the Internet, but finally I found a solution that works on the lastest versions of IE, Firefox, Chrome and Safari. The following code solves the problem for good:

<head>
  <script type="text/javascript" src="swfobject.js"></script>
  <script>
    function setFocusOnFlash() {
      var f=swfobject.getObjectById('myFlashObjectId');
      if (f) { f.tabIndex = 0; f.focus(); }
    }
  </script>
</head>
<body onload="setFocusOnFlash()">

This example assumes the flash is embedded using the SWFObject library. If not, you should set the f variable to the Object or Embed tag which holds the flash movie.

Edited on 5 May 2012: Well, unfortunately it seems that the tabIndex workaround no longer works for all combinations of browser (Chrome/Safari) and operating system. For instance, currently Chrome 18 on Windows fails.

See the link below, provided by Christian Junk, to get the status of the problem's resolution.

回答3:

Unfortunately there is no way to ensure that you can set focus to a flash file that works in all browsers. IE and Firefox have solved this problem (for the most part), but Chrome and Safari are both based off of Webkit which does not have a solution.

If you ever notice on YouTube or other video / flash site that the first thing you see is something to entice you to click on the player, that is due to this problem.

One developer came up with a clever workaround, but it does involve adding some ActionScript to your flash file, this can be a pain in the ass if you are building a generic player.

Gary Bishop: Fixing Firefox Flash Foolishness

Another sort of solution is to set your wmode to opaque. I've heard this works in some situations, but will screw up cursors in text areas. I haven't had much luck with this either, but you can give it a shot.

You can find more information about the no focus bug on bugzilla.