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Cross-Domain Javascript execution

In one of the projects I am faced with problem of the java scripts execution on different domains.
After advice from one of team leaders, the solution was found and it was a quite simple.
For example, we have A domain with frame that point to domain B which is to call javascript function in domain A.
If you simply call a window.parent.funcame you will get exception. So what can we do ?
It is very simple – in domain B we create frame to domain A and then we try to execute a function on domain A as window.parent.parent.fucname and how we can see function is executed succesufully.

So this script does this operation automatically without requiring knowledge of java script.

Credits: Nir Levy
Domain A:
Main file:
function showmelove(text)
... some content here ...
<iframe id="hpel" height="100" frameborder="0" width="100%" scrolling="0"title="" src="http://domain_b/iframe.html" style="height: 194px;"></iframe>
... some content here ...
Exec file:
<script type="text/javascript" src="crossdomain_server.js"></script>
<script type="text/javascript">
Domain B:
<script src="crossdomain_client.js" type="text/javascript" ></script>
function sendText() {
crossdomain.client("frame").callfunc("showmelove",{mesasge: "'hello world'"});
<div id="allBodyDiv">
some content goes here...
<input type="button" value="send" onclick="sendText()" />


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Virus f Opyum Team

Symptoms :: 
Several processes running named f or i. 
Network choked
Apache Dead
Unknown entry  * * * * * root f Opyum Team in crontab

Investigate ::
Try to kill the f process and even root will be unable to kill it. Check file named f and i in /etc or /bin or /usr/sbin directory. Try to delete, the file f  will not delete.  Some unknown .jpg files will be there in the same folder. 

Solve :: The root is unable to delete the file f because of the immutable bit in f
To remove it use ses or chattr
Follow the below steps to remove it completely.....

remove the unknown .jpg files in system folders

(kill process f) option k

#ses -i /bin/f
#rm /bin/f
#ses -i /etc/crontab
#vi /etc/crontab (and delete last line)

Precautions ::  In my case the server was hacked bu Brute-force attack
So set a good password with a combination of upper,lower case letters and special characters.

Post your feedback or any issues you may face removing the virus.  Very less number of good threads are there explaining …