safari does not allowed cross-domain cookies in iframe

IE & Safari Browser blocks cross-domain cookies in an iframe.

e.g. I have two websites, let's say they're

example.com

and

anotherexample.net

.

On

example.com

, I have one page

http://example.com/someform.asp

and in this page i am using cookies. When I open

http://example.com/someform.asp

directly in browser, it is working fine.

On

anotherexample.net

, I have page

http://anotherexample.net/page.asp

, this page contains an

IFRAME SRC="http://example.com/someform.asp"

. Now when we open

http://anotherexample.net/page.asp

page in browser, the cookies for

example.com

are not saved. In Firefox and chrome this problem doesn't appear.

I found that using p3p policy we can fix this, but after setting below p3p policy in IIS response header and its works for IE only.

P3P : CP="This is a P3P policy! See http://www.workplaceanswers.com/privacy-and-terms/"

But, I am still getting the same error in safari. I have tried with different p3p policy values as below but not able to fix it.

P3P : CP="CUR ADM DEV HIS TEL STA STP COM” P3P:CP="IDC DSP COR ADM DEVi TAIi PSA PSD IVAi IVDi CONi HIS OUR IND CNT” P3P:CP="IDC DSP COR CURa ADMa OUR IND PHY ONL COM STA”

Is there any way to make this work in Safari?