Forms on websites are a handy way to get information from your visitors. However it’s easy for a visitor to accidentally send more than one copy of a form by clicking on the form’s “submit” button more than once. The end result can be that identical emails get sent to the Webmaster, or identical records get added to a database.
- Show a random image or piece of text on the page
- Make a link that links to a random page
- Create games that people can play in their browser
[Read more…] about Fun with Random Numbers
In this tutorial we’ll take a look at using the
Date object, and end with a simple example script that displays the current date on the web page!
One of the key features of all good programming languages is the ability to control the order in which actions are performed. For instance, you may want to run one piece of code if the user has selected a checkbox, but run a different piece of code if they haven’t selected it. Or, you may want to run the same piece of code 10 times (for example, if you’re creating a drop-down list with 10 items).
In this tutorial you’ll learn how to write code to make decisions (e.g. “if the user has selected this checkbox, display this message”), and perform the same action many times (called “looping”).
Read on to find out how…
Get the idea?
Multiple pop-up windows can be a real pain, especially now that certain free web space companies are getting in on the act as a method of advertising, so go easy on them. A good rule of thumb is: if you’re opening two new windows, you’re opening one too many!