Objects that accept data can be associated
with FormCalc or JavaScript expressions. For example, you can use
scripts to calculate a value or validate user-entered data. In most
cases, the validity of data is controlled through the attributes
of the object. In the case of objects that require complex input
(edit) patterns, the validity is controlled through pattern settings
in the Value tab of the Object palette.
Some objects can be used to initiate client requests. For example,
you can set up a button to query a data source at run time. In this
case, you must also write a script to return the requested data
value to a specific field in the form.
You can write scripts to execute commands, functions, or calculations
when any of an object's events occur at run time. An event will
initiate at run time when the user performs the action that the
event specifies. You can call any of an object's supported methods
and examine or set properties by defining a script.
Some objects, such as circles and content areas, do not support
events. The objects that support scripting and calculations or that
initiate events include barcodes, buttons, check boxes, date/time
fields, drop-down lists, flash fields, image fields, list boxes,
numeric fields, password fields, radio buttons, signature fields,
subforms, and text fields. The supported events are object-specific
and vary from one object to the next.
