Alert windows
This program shows how to create alert windows.
Programming Issues
Here we show the three flag images we have used in previous examples. When clicked, the script causes an alert window to
appear telling the user which flag he clicked. We catch the onclick event for each of the three images, and call
the alertImage() function passing an argument to let it know which of the three images we clicked. The code to create
an alert box is: alert.("You clicked the Welsh flag!");.
Note we could, in this case, just as easily have embedded the JavaScript code into the event handler itself, as so:
<img src="walesflag.png" onclick="javascript: alert('You clicked the Welsh flag!')" />. Note that
we have to enclose the alert message in single rather than double quotes in this case, because double quotes are used to embed
the code itself.
Demonstration
