javascript function calls stripped of

[devstylex]

Added calls to javascript functions are stripped of. So snippet 1 is changed into snippet 2. But snippet 3 is saved without any changes by the content editor (web part). Can anybody tell me how I can enable adding attributes to hyperlinks to just call javascript functions?

Snippet 1:
<a href="javascript:function();" title="">
<img src="/dir/file.jpg">
</a>

Snippet 2:
<img src="/dir/file.jpg">

Snippet 3:
<a href="

http://www.google.com"

title="">
<img src="/dir/file.jpg">
</a>