Hi Karen,
The Tab has a page include.
the page has a title bar , there i have that button.
I have a java script snippet on that page.
That java script calling a apex web service method .
In that button , i am running the java script snippet. so that the method will execute.
Now i am added the Ajax toolkit in the page. Now its working good.
If you have any better suggestion kindly suggest.
Thanks for the reply
Best Regards,
Nadin