Description of problem:
Using 

<a href="#" onClick="window.open 
('http://www.sony.com/','myExample4','width=200,height=200')">hello</a
>

in html source works at first. But if I return to the saved Article 
and do more editing later, the code stops working. The code has been 
changed by the system to

<a onclick="function anonymous()
                                 {
                                 

window.open
('http://www.sony.com/','myExample4','width=200,height=200')
                                 }" href="#">hello</a>

Futher editing and previewing results in more function anonymous() 
code being added automatically.


Version-Release number of selected component (if applicable):


How reproducible:
Every time.

Steps to Reproduce:
1.add <a href="#" onClick="window.open
('http://www.sony.com/','myExample4','width=200,height=200')">hello</a
> into any Article content item source.

2. Save and Preview. Click hello. Sony.com pop-up appears. This is 
all ok.

3. Now go back and edit the Article. Any editing, say add some random 
text elsewhere in the article.

4. Save and Preview. Click hello. 
 
Actual results:
Sony.com pop-up does not appear.

Expected results:
Sony.com pop-up appears.

Additional info:
Arturo Dell has also observed this problem.