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Possible Duplicate:
When do I need to specify the JavaScript protocol?
onclick=“javascript:func()” vs. onclick=“func()”

What exactly is the difference between the two code below ?

  1. <input type="button" value="click me" onclick="a()">

    and

  2. <input type="button" value="click me" onclick="javascript:a()">

    Where "a()" is any javascript function.

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Ranjan Kaliya
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  • Using `javascript:` there has the same effect as using `foobar:`: None. – Felix Kling Dec 11 '12 at 05:52
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    Both are equally bad practice and old fashioned – KooiInc Dec 11 '12 at 05:55
  • The only case where it is *necessary* is when you make a bookmarklet, in which case, by default, `http` is assumed as the protocol, which you might not want. – Anirudh Ramanathan Dec 11 '12 at 05:56
  • @Cthulhu: It's never necessary in inline event handlers. You were probably thinking about `a` elements and the `href` value. – Felix Kling Dec 11 '12 at 07:27
  • @FelixKling Yes, I said above that it was necessary esp. when making URLs for *bookmarks*, in which it is automatically assumed to be an `http` URI when devoid of protocol. in inline event handlers, unnecessary, agreed. – Anirudh Ramanathan Dec 11 '12 at 07:31

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