How do I do the opposite of this?

(right now this script turns the fields ON when the button is checked. I need it to turn the fields OFF when the button is checked).

var nHide = event.target.isBoxChecked(0)?display.visible:display.hidden;
this.getField("LblShippingInfo").display = nHide;
this.getField("LblShippingStreet").display = nHide;
this.getField("ShippingStreet").display = nHide;