Validating select box

In that case, the validation is performed as users work in the browser.

For example, you don't want to process a form that's missing critical information.

Hi, I've defined the validation for my form fields in the (I'm using struts 2).

I'm having trouble validating a multiple select box.

For example, here's what the page looks like if you forget to enter a course name, if you enter an, and if you enter an invalid date: By default, user input is validated after users submit the page — that is, the validation is performed in server code.

A disadvantage of this approach is that users don't know that they've made an error until after they submit the page.

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Sometimes you have to validate information that doesn't come directly from an HTML form.

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