This question would be better answered at one of the asp.net forums rather than the Training and Certification forum. When you repost it in the correct forum, be sure to post more details, since the small fragment of code that is visible in
your picture does not show the part that is generating the error.
Anyway, the problem most likely is exactly what the error message says, i.e., your code is attempting to reference an item named Login_Click that you failed to declare elswhere in the code. This part is not visible in your picture, so we can't provide a
more detailed response about where the error is precisely located.
Javascript Runtime Error: Login_Click undefined
