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Details Frequently Asked Question (FAQ) Document Number: 544 Optimize for Printing E-Mail This Link  Feedback This document ... helps resolve my question or problem. does not apply to my question or problem. is inaccurate for my question or problem. Is there a way you can make a text input field required? Yes. If your text field was: <input type="text" name="VAR000"> Then add the following line to the HTML of your button: <input type="hidden" name="VAR000_undefined" value="ERROR: Please enter a value.">