As you saw earlier, it is very easy to
use the NAME value of an HTML SUBMIT button to determine which
action to perform in a script. Thus, we typically see code as
follows:
if (delete button ne "")
{
do something
}
In other words, if the user has clicked
the delete button (and the delete button has been assigned the
VALUE), we will perform a deletion. If however, some other
button is pressed, the VALUE of the delete button will be null
and the action will not be performed.
However, what if the user clicked an
INPUT TYPE = "image" button?
In this case, we will use similar
logic...
if ($form_data{'delete_image.y'} > 0)
{
do something
}
As you can see, the script checks to see
if the y coordinate has been assigned a value (meaning the user
clicked on it) and if so, performs an action.
