Handling Image Input
Handling Image Input
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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.
Additional Resources:
 Non-Parsed
Header Scripts
Table of Contents
Debugging CGI Scripts
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