Introduction to the use of form's OnSubmit and input type=image_HTML/Xhtml_Web page production

If there is here, then the form will be submitted directly after pressing the image.

If there is OnSubmit, this function will be executed first. If false is returned, the form will not be submitted!

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The code is as follows:

< ;form name="F1" onSubmit="fuck();">

Another example:

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Code As follows: