ASP is a foreign language here. And you will find few who speak it. You will probably get better advice from some ASP forum.
We might be able to offer some help if you post a link to your page on a website. But we can't guess what is wrong just from looking at a part of your code, much of which is in a foreign language! If you post a link to your page, at least we can use developer tools to look at the HTML and JS that your ASP produces.
I note that the tutorial you used must be ancient, because it uses jQuery 1.3.1 which is Paleolithic. You will probably have better luck with a more recent tutorial.