title: hiding text entered in a type text input
body: <p>I have a card reader which connects to computer via USB,it's supposed to print a 10 digit number when an input is focused on and a card is placed over the card reader, it works fine but I need the code to be invisible. when I hide the text using <code>color:transparent</code>, the text is hidden but when the user double clicks on the input it shows the text!
  Thanks in advance.</p>