Acrobat Prepare Form Help Instructional Text If Left Alone Should NOT Print

Good afternoon,

I am using the prepare form tool in acrobat.  Obviously I am a beginner,  I want the field text box to display instructional text, however if the user leaves the box untouched, I do NOT want the instructional text to print I want it to be blank.  I want this for two reasons, sometimes we print this form and fill it out by hand so we need the boxes if untouched to NOT print.  However if we enter data into the box, we want it to print.  Can anyone help me with this function?  I have attempted to decipher javascript but I am having difficulty.  If there is a SPECIFIC set of steps I can take to make this program do precisely what I am asking, please let me know where I can find them or if anyone knows what to do and would be willing to provide them, I would be so appreciative I will donate $25 to a charity of your choosing. 

I have asked about this function before and I just can't seem to get it right.

I appreciate your time, patience and attention to this matter.  I just want to stop being embarassed in the presence of my colleagues and supervisors because this form works at the beginning after I adjust it according to the advice given but then there is an eventual snag and something that used to work doesn't or now something doesn't work if this and that happen and the document becomes unusable, the person trying to use it is frustrated, and that frustration, rightfully so, is redirected at me.  

Thank you,

J