The error-page Element

 <error-page>
     <device-type>[ajax|mil]</device-type>
     <exception-type>ClassName</exception-type>
     <location>the error page's URI</location>
 </error-page>

It specifies an error page used when an un-caught exception is thrown in updating a ZUML page (e.g., in an event listener). Each page is associated with an exception type, aka, a class deriving from java.lang.Throwable. You can specify multiple error pages, each with a different exception type. When an error occurs, ZK searches the proper error page by examing the exception type one-by-one. If none is found, it shows, by default, an alert message at the client.

The device-type element is optional. If omitted, ajax is assumed. If you want to specify an error page for mobile devices, it has to be mil.

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