The defaultValue gets the HTML VALUE attribute of the password box.
<html> <head> <title> Example of the password defaultValue property</title> </head> <body> <form name="form1"> <input type="PASSWORD" Name="pass" size=10 value="pass123"> <br> <input type="BUTTON" value="Show Password" onClick=alert(document.form1.pass.defaultValue)> </form> </body> </html>