Add instructional text to my text field that will disappear when clicked? I want to add some text into a form field to instruct respondents how to fill out the field and have the text disappear when the respondent clicks the field.

Is there a way to add instructional text to my text field that will disappear when clicked?  I want to add some text into a form field to instruct respondents how to fill out the field and have the text disappear when the respondent clicks the field. Is this possible? !