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Comment: added tip related to IE and multiple submit input/button elements

Excerpt
hiddentrue

How to use multiple submit buttons in forms


When we have a form with only one submit button, the default Form's onSubmit() method will be called. If the Form has more than one submit button, then the mechanism works differently.

Info

It is a good idea to use input instead of button elements in your form hierarchy. IE tends to send all button values, making it difficult to establish the one used to submit.

To have more than one submit buttons in a Form, we need to create custom Button by subclassing from wicket.markup.html.form.Button. We define the custom Button behaviour by overiding the onSubmit() method and add the buttons to the Form. When the user click on any of the buttons, the specific behaviour of the button is executed by calling the button's onSubmit() method followed by execution of form's onSubmit() method.

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