Cache problem for safari browser

[eluser]crimsun[/eluser]
Thanks for your comment Insite...

I have rearranged the code as per you provide and make all changes. but still i face the same problem on safari browser..as i see when i logged in site the site set two cookies variable and after logged out only one cokkie variable destroy one is till there and if i use the browser back button then that another cookie variable get destroy and redirect to login page...this happened only for firefox,chrome,,,but In safari it should not destroy the cookie is still there..

Please suggest me any other solution for this...

Thanks in advance...
Sanjay