Changing the text of a submit button when clicked can be useful if you are writing an AJAX application or you know that there will be some sort of delay. Providing the user with some form of feedback is a useful way of letting them know they they have done something.
First, we need a form to work with, so I built a quick one here. Notice that the submit button has an onclick action associated with it, this will be used later to enable us to alter the text of the button.
I quite often find myself needing to know how long a string is, especially when testing form validation or when trying to write a page description. I therefore like to have this little tool to help me by simply counting the number of characters in a given string.
If you want to create a link that performs an action that can't be rolled back then you might want to stop the user from clicking that link unless they really want to. The best way to do this is to intercept the link with a confirm() command.
The first way to do this (and especially useful if you want to ad other functionality) is to use the following function.
The following snippet shows the creation of an array of things that can't be referenced by a normal for loop due to the odd numbering of the keys.