Thanks for your reply.
I never tried the website with Internet Explorer. When I tried, Admin Login page is loading (I have enabled showing the script errors). When I tried to login, it shows the below JavaScript error. I am not able to login to the system as well.
SCRIPT5007: Unable to get property 'documentElement' of undefined or null reference
Telerik.Web.UI.WebResource.axd, line 166 character 2
HTML1524: Invalid DOCTYPE. The shortest valid doctype is "<!DOCTYPE html>".
Tried the same with FireFox. Admin Login page is loading. When I tried login it works fine and redirects to home page.
While loading the homepage, it shows JavaScript error at "title: 'Confirm" in the dnn.Confirm
When I try to open the "Edit Content", it shows JavaScript error at dnn.modalpopup.js , once continued, the popup opens without the editor.
Thanks,
Suman