As promised, here's the complete source code for my JSP based "Web Calendar" project. If you haven't seen it yet, here's a link to my working JSP-based Web Calendar (calendar.jsp) project.

Every once in a while I'm asked something like, "How can I tell if I have a valid user session in my JSP code?"

I was just working with a JSP, and trying to remember how to get information that can be very helpful inside of a JSP, specifically how to determine the Context, URI, and URL from within a JSP.

It's been a long time since I worked on an old-school JSP (without the benefit of a framework like JSF or Struts), but I've wanted to add alternating row stripes ("zebra stripes") to some HTML tables in some old JSP's for a long time. I like tables with zebra stripes because they're easier to read, so now that I have some free time, I finally got this done.

When I create a web-based user interface I tend to be a fanatic about making sure that the first input field on a form gets input focus when the form is first displayed. It always drives me crazy when I go to a web form that requires text input, but the page author hasn't taken the time to put the default focus in the first field of the form.

I created a JSP this morning that prints out the equivalent of most traditional CGI parameters. Sometimes I use these to debug a problem, other times I use them within JSP/servlet code for other non-debug purposes.

Here's the Java source code for my JSP CGI page, which I named cgiParams.jsp. As you can see, most of these variables come from the JSP request object:

I can never find a list of states for an HTML select/option list (aka, combobox, drop-down list) when I need one, so I'm putting two versions here. The first select/option list shows a list of states, but only shows the abbreviations of the states:

Here's some JavaScript code I found today while poking around the net. Embed this JavaScript code in a web page, and a user can simply double-click anywhere on the page to automatically move back to the beginning of the page. Pretty cool idea. Here's the code: