cakephp-1.3 > AjaxHelper :: observeField()
A AclBase AclBehavior AclComponent AclNode AclShell Aco AcoAction AjaxHelper ApcEngine ApiShell App AppController AppController AppHelper AppHelper AppModel AppModel Aro AuthComponent B BakeShell BakeTask BehaviorCollection C Cache CacheEngine CacheHelper CakeErrorController CakeLog CakeRoute CakeSchema CakeSession CakeSocket ClassRegistry Component Configure ConnectionManager ConsoleShell ContainableBehavior Controller ControllerTask CookieComponent D DataSource DbAcl DbAclSchema DbConfigTask DboMssql DboMysql DboMysqlBase DboMysqli DboOracle DboPostgres DboSource DboSqlite Debugger Dispatcher E EmailComponent ErrorHandler ErrorHandler ExtractTask F File FileEngine FileLog FixtureTask Folder FormHelper H Helper HtmlHelper HttpSocket I I18n I18nModel i18nSchema I18nShell Inflector IniAcl J JavascriptHelper JqueryEngineHelper JsBaseEngineHelper JsHelper L L10n M MagicDb MagicFileResource MediaView MemcacheEngine Model ModelBehavior ModelTask MootoolsEngineHelper Multibyte N NumberHelper O Object Overloadable Overloadable Overloadable2 Overloadable2 P PagesController PagesController PaginatorHelper Permission PluginShortRoute PluginTask ProjectTask PrototypeEngineHelper R RequestHandlerComponent Router RssHelper S Sanitize Scaffold ScaffoldView SchemaShell Security SecurityComponent SessionComponent SessionHelper SessionsSchema Set Shell ShellDispatcher String T TemplateTask TestSuiteShell TestTask TextHelper ThemeView TimeHelper TranslateBehavior TreeBehavior V Validation View ViewTask X XcacheEngine Xml XmlElement XmlHelper XmlManager XmlNode XmlTextNode

observeField

line:430 at /cake/libs/view/helpers/ajax.php
Observe field and call ajax on change.

Method

(string) observeField ($field, $options = array())

Parameters

ParameterTypeCommentDefault
$field string required DOM ID of field to observe
$options array optional ajax options array()

Return

string

Comment

Observe field and call ajax on change.

Observes the field with the DOM ID specified by <i>field</i> and makes
an Ajax when its contents have changed.

Required +options+ are:
- <i>frequency</i>:: The frequency (in seconds) at which changes to
this field will be detected.
- <i>url</i>:: @see url() -style options for the action to call
when the field has changed.

Additional options are:
- <i>update</i>:: Specifies the DOM ID of the element whose
innerHTML should be updated with the
XMLHttpRequest response text.
- <i>with</i>:: A Javascript expression specifying the
parameters for the XMLHttpRequest. This defaults
to Form.Element.serialize('$field'), which can be
accessed from params['form']['field_id'].

Additionally, you may specify any of the options documented in
@see linkToRemote().

@param string $field DOM ID of field to observe
@param array $options ajax options
@return string ajax script
@link http://book.cakephp.org/view/1368/observeField