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Validators can implement WebWork adds support for client-side validation on top of XWork's standard validation framework. Any validator can be extended to support client-side validation by implementing the com.opensymphony.webwork.validators.ScriptValidationAware interface to provide support for client-side validation:

public interface ScriptValidationAware extends FieldValidator {
    public String validationScript(Map parameters);
}

...

To enable client-side validation, use , first make sure you have defined the correct validators in validators.xml. You must be using the com.opensymphony.webwork.validators.JavaScriptRequired*Validator instead of the standard XWork validators. Then, when you specify the <ww:form> tag, add validate="true":

<ww:form name="'test'" action="'javascriptValidation'" validate="true" >

  ...
</ww:form>

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