Some Cool Tricks JavaScripts:

 -- Display password under ************* for  gmail/facebook + many more
Simple javascript - just copy and paste in browser(one is for fb and another for gmail)

e.g. go to facebook, type email and password & copy the above line in addressbar & hit enter

javascript: alert("Password:"+document.getElementById('pass').value);  //for fb
javascript: alert("Password:"+document.getElementById('Passwd').value);  //for gmail

& now, you should know how to do for other pages. Go to the source and look for name in the password input type

in gmail:

Password:
</span>
</td>
  <td><input type="password" name="Passwd" id="Passwd" size="18" class="gaia le val" />

just replace the id in above javascript. If id is not there, getElementByName also works.