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How to disappear a message after a timeout

I have a simple login page that displays a message if the login was not successful. I want this message to disappear after 5 seconds, but I cannot get it to work.

Part of the input (removed most of the unnecessary material):

<h:inputText title="Name" value="#{authBean.name}" id="username" />
<h:inputSecret title="Password" value="#{authBean.password}" id="password" />

<p:commandButton id="loginButton" action="#{authBean.loginAndRedirect}"
          update="@form" value="Login" />
<h:message id="messages" for="login:username" />

What I have tried so far:

The command entered on the Firebug command line works fine: $('[id$=messages]').fadeOut();

Now I need to start it with a timer:

setting a callback on such a button does not work (no effect, no errors):

<p:commandButton ... oncomplete="setTimeout(5000, '$('[id$=messages]').fadeOut())" ... />

I tried it with onclickand oncomplete, but without effect and without errors.

Tried to use primfaces effects (jQuery wrapped effects) in an element message:

<h:message id="messages" for="login:username" errorClass="errorMessage">
  <p:effect type="fadeout" event="load" delay="5000">
    <f:param name="mode" value="'hide'" />
  </p:effect>
</h:message>

no effect, no errors.

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function setTimeout(). , , JavaScript. .

.

<p:commandButton ... oncomplete="fadeoutfunction()" ... />


function fadeoutfunction(){
 setTimeout(function(){
    $('[id$=messages]').fadeOut();
 },5000);
}
+5
<p:commandButton ... 
oncomplete="setTimeout(function(){$('[id$=messages]').fadeOut()},'5000')" ... />
+2

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