JavaScript to test for Internet Explorer

What would be the shortest java-script to return 0 i开发者_如何转开发f not internet explorer, and 6-9 for which version it is?

---

With jQuery:

!$.browser.msie ? 0 : $.browser.version

Without jQuery:

!navigator.userAgent.match(/MSIE/) ? 0 : parseInt(navigator.userAgent.match(/MSIE (\d+)/))

---

One option: use IE's conditional comments:

<script>var IEversion</script>

<!--[if IE 8]>
<script>IEversion = 8</script>
<![endif]-->

---

As above both implied, it all depends on your use and context. In general, I'd say this is the best as it detects regardles of js turned on or off:

<!--[if IE 8]>
<script>IEversion = 8</script>    /*stylesheet, script, or whatever in there. */
<![endif]-->

CSS Tricks has the full list and basic overview

The jQuery by Radu if it's depending on jQuery, or another depending on your use. And some frameworks/libraries have a method included, so double check there.