Help with Javascript for changing form field to white when text is entered

[Erika0D44]

I am having trouble with my script. I can get it to change to white in the form field when I enter text as I wanted, but I can't get it to change back to transparent if no text is there or deleted. I think I need an if/then statement but I can't seem to get it worded correctly. 

Any help would be greatly appreciated.

Here is what I have so far, which works if I put it in "custom", or o"n focus":

// custom keystroke action;
FillHighlight(event.target.name, color.white);

Thank you!

[Bernd Alheit]

What does you use in the function FillHighlight?

[Erika0D44]

It was the only thing I could think of....when tabbing or highlighting thru the fields, I wanted to change the fill. I know very little about Java but I knew that it had to be possible to do some kind of if/than statement to code the change. Thank you for responding to me.

[Nesa Nurani · Accepted solution]

Try this code:

event.target.fillColor = event.value != "" ? color.white : color.transparent;

[Erika0D44]

THANK YOU!!

I put the code in the validate scipt option and it works like a charm! Thank you so much!