Window Handler mesage or Dialog box is not handling in Selenium Webdriver usign Safari or IE

Hi Guys,

I created a new script for Safari and IE broswer. In middle of the script, i need to do operation called refresh. When we refreshing the page , it throwing the windows or broswer handler dialog box

" Your Browser session will be revalidated
Are you sure you want to reload this page
Leave a page
Stay on this page"

Above message is getting while refreshing the page. So i implemented the Code was 

"driver.manage().deleteAllCookies();
Thread.sleep(1000);
driver.navigate().refresh();
driver.switchTo().alert().accept();
Thread.sleep(2000);"

This code is working fine in the Google chrome and Firefox. But it is not working in the Safari and IE. Anybody can you tell me how resolve this issue and any sample code for handling the windows. Its very urgent

Regards
Saravana