I am using a4j:support tag to reRender a component on my page and it is getting stuck in IE 9 & IE 10. I used the recommended solution of setting the response header "X-UA-Compatible" to "IE=EmulateIE8" but it did not work as my page is being rendered in iFrame on another parent page. I also came across another solution to modify the Ajax.js file in the Rich Faces libraries but I felt it is tailored for IE 9 only. I believe this is an old discussion topic. I will highly appreciate if any suggestions are given to overcome this issue.