Sometimes you can make the life of your users easier when filling web forms by placing a prompt for what is required in the form field itself. Obviously you only want to do that when the field is blank, otherwise, if a field has a value then that's likely to be what the user wanted to enter. Using this plug-in, whenever you create a form <input> element you can specify such a prompt, and it will only appear when the field contains no input.

The Figure shows the plug-in being used to display the string "Required Field: Please enter your Username here" in a field where a user name is being requested.

No text has been entered into the field so the prompt text is displayed