Pops up a special input box that uses a password field, so the text isn't echoed back in clear-text to the user. Returns the text they entered, or None if they canceled the dialog box.
This scripting function has no Client Permission restrictions.
system.gui.passwordBox(message [, title] [, echoChar])
String message - The message for the password prompt. Will accept html formatting.
String title - A title for the password prompt. [optional]
String echoChar - A custom echo character. Defaults to: * [optional]
String - The password that was entered, or None if the prompt was canceled.