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For DB design, check out some of the suggestions mentioned in the "sql database" thread. Once you've got a firm understanding of relational databases, it's time to study programming. You'll need to use server-side scripts (written in e.g. PHP or Perl) to interact with the database and generate...

W3Schools is outdated and incomplete. X10 partially supports ASP.Net via Mono (note: ASP is different from ASP.Net, and X10 doesn't support ASP). You might have problems running code developed for ASP.Net on Mono. In particular, not all assemblies are available to Mono. See also the "Want...

If your research work requires .Net and remote access to an SQL server, the free X10 accounts aren't a good fit. Consider running IIS and SQL Server Express on a MS Windows box of your own.

Meaning that the port shouldn't have been open. If it was, it was a mistake. The policy hasn't changed, though the erroneous rules may have been.

If you're on a free server, port 4445 should be blocked by the firewall; that your script worked before was an oversight. The paid servers have different rules and have more open ports, but still block all but a few commonly used ones. With a VPS account, you can have any port you wish open.

I'm reminded of a certain conversation between an English girl and an egg. And another conversation at a tea party.

Since the text boxes and textbox ends are floated, float the labels to preserve document order. Alternatively, float nothing and keep all the elements as inline elements (replace the <div>s with <span>s). On a related note, the label tag for "next" is in the wrong place. You have: &nbsp;[and...

Absolute positioning will just introduce more problems. Rather than trying to get the right column to stretch to the footer, put the border on the main content, but as a child of the left column element so it doesn't mess up your relative widths. <style type="text/css"> #MainCol {...

No browser supports PHP because it's a server side scripting language. You could, I suppose, create a browser extension to support client-side PHP (like the old Tcl plugin).

Do you have a picture illustrating the affect you want? Do you want the right column to stretch down to the footer, or end at the viewport? Will the right column have a background? If not, you could simply give the left column a right border, rather than giving the right column a left border. A...

How, exactly, does it break? What errors are you getting, if any? Did you check the error log? In addition to the error log accessible via cPanel, sometimes you'll find other error logs scattered around various folders; look for them.

Next time, search the forums. This question has been covered in a few different threads (here's another and another) (in short: you can't do that on the free hosts).

The thread "CSS Issue" includes links to pages describing floats.

You neglected to include a link to a live page.

This approach won't prevent hijacking. The ID and email stored in the session will always match those stored in the DB, since you update the DB whenever you set the ID. Remember, what you need to do is examine data coming from the client, compare something from the current request to something...

Server config issue; try the link again, if you're curious. However, it sounds like you found a better solution.

No worries about asking silly questions. Kudos for finding the answer, and thanks for posting it so that others might learn. However, I'm almost certain this question has been asked before on these very forums, and undoubtably been asked elsewhere. That's almost as good as you can get it when...

You're probably referring to session hijacking. Data stored in sessions is stored on the server, so isn't directly accessible to site visitors (a script can store user input in a session, so session data can be indirectly accessible; access to session data by local users will be considered...

PHP and Ruby are server side. JS is (mostly) client side (there is such a thing as server-side JS, but it's uncommon). They're used for different things. If you're thinking of using X10, the X10 servers (at least, the free ones) don't appear have a Ruby interpreter installed. Even if Ruby on...

It's a combination of HTML, JS for behavior and CSS for styling. Here's an (incomplete) example of a multiline select widget.