This section provides many functions related to form operations, including the following sections. When returning elements through the $ method, they can be called directly through $(element).method():
Form object: provides some methods to manipulate the entire form
Object: Provides a method to manipulate a form element
TimedObserver class: periodic form monitor, executes a callback function when the form element value changes, there are two types: Form and Element
EventObserver class: uses events to monitor form elements. When the form element value changes, a callback function can be executed. There are two types: Form and Element.
Form object:
reset(form)：()
serializeElements(elements)：Serializing elements in elements is to return the queryString form of all elements specified, which is easy to use in xmlhttp or other places.
serialize(form)：Serialize the entire form
getElements(form)：Returns all serializable elements of the form
getInputs(form, typeName, name)：Return all typesName and name matchinginput element
disable(form)：Keep the entire form unavailable
enable(form) ：The entire form is available
findFirstElement(form)：The return type isThe first non-hidden element available for 'input', 'select', 'textarea'
focusFirstElement(form)：makeFindFirstElement(form) returns the element to get focus
Object:
focus(element) select(element)：Encapsulation of built-in methods for html elements, except for returning the element itself
serialize(element)：Serialize the specified form element, return the form key=value, and the returned string has beenencodeURIComponent
getValue(element)：Return the value of the element
clear(element)：Clear the value of the element
present(element)：Determine whether the value of the element is not empty
activate(element)：Give the element focus
disable(element)：Make elements unavailable
enable(element)：Yes elements available
$F = Easy to use
as well askind:
Periodically monitor form elements. If the value of the form or form element changes, execute a callback function, and use it as follows:
var oser=new (element, frequency, callback)
or oser=new (form, frequency, callback)
callback can define two parameters form/element,()/value
andkind:
These two classes are similar to the above, but are not periodic monitoring, but use the element's change or click event to monitor the changes of form elements. When a change occurs, the parameters are the same as above.