Simple Question about conditional formatting

I have a form, with a check box and three text fields.

If i tick the check box, i want the text in those fields to go red.

If i de-select the checkbox, the text in those same fields go back to black.

Is there a code for this?

Thanks in advance.

You can do this easily with JavaScript.

Create a CSS class that creates red text and whatever else you would like changed. Then add an event that fires when a checkbox is checked. This function should change the element's class to the red alternative. Deselecting would then change it back to it's normal display class.