Today I have experienced one strange issue on my project. In my local machine everything is working fine but when I have uploaded it on server then it gives me an error.
I have tested it in other browsers and everything going fine but when I tested it on IE11 then it raise the __dopostback error.
I got one link from microsoft regarding this error http://support.microsoft.com/kb/2836939/en-us.
I have updated .net framework version 4 and it solves my problem.
Hope this will also help you !!!