Posts Tagged ‘Forms’

JavaScript codes can be injected in the address bars of web browsers to edit online forms before submitting them, bellow I am posting an example for archiving purposes.

Assuming the page has a contact form, where submitted data is sent to an email address included in a hidden HTML input tag as in the following code:

…
<form name="ContactForm" action="submit.php" method="post">
<input type="hidden" name="Email" value="admin@website.com" />
…
</form>

To change the email address to: myemail@hotmail.com, the following code can be injected:

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Who doesnt need to implement a data validation technique along with every online form?

Bellow is a basic javascript code to check that no form is submitted with empty fields:

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