This is an Expert System. Try using one of the languages like Lisp But I dont know how to use them in the web.

Hi all, I am developing a web page that has an inside. productDetails page is generated by users in html format and there is no standard layout. So when I show this page in an iframe I want to know the height of the page so that there wouldn't be any white blank places in the page. I also do not want vertical scroll bars. So I think I have to find the height of the page in iframe's src. Is there anyway I can do this ? Thanks in advance. </x-turndown>

Use database instead. When a user makes a choice save this as an information for that user as "UserHasMadeChoice" column and make its value 1. Then when the user makes a choice first you control this value for that user. If UserHasMadeChoice is 1 then you show a warning like "You have already made a choice"

You can use Macromedia Flash for this purpose. Flash professional 8 has(i'm not sure whether the previous versions have or not) a feature named Flash 8 video encoder.

First you have to save the records to be deleted for later highlighting them. Save them to a dataset or whatever you find yourself comfortable with. Then when deleting the rows use try catch error handling. I hope you know how to use try catch stuff. Whatever. Then in the catch part if there are any errors you can your saved datas there and highlight the previously them.

If you have something in the design of the control that you do with some variable code then this occurs. For example you may be showing something that the control can only reach when the executable just runs. Something which can only have an appropriate value in runtime etc. Look for such things. You most probably have some code in control's initialize method.

I heard something as "Click-Once" that allows you to use those Forms as Java applets in the web.