What exactly are you trying to accomplish?

Where do you want to be printed?
I would suggest to have a button with each row that has that "onclick" event.
When the rows are dynamically created you can have the value you want to be printed...

You can at least use this:

<input type="password" name="pass" id="pass" />


When the user clicks the button use javascript to get the value of the field and do whatever you want.
But you...

Try this site with tutorials:
http://www.w3schools.com/

I usually use javascript to manipulate the state and value of the input fields. Haven't combined it with tables.
But I would suggest to post the code you have for the table as well as the javascript...

The "mainMenu" should be the id of the table.
Since you are using this:
document.getElementById("mainMenu")

It is quite obvious when you say "getElementById" that the argument should be the id...

My reply was to the first post where kishor_agrawal posted a javascript question to a java forum and the post was moved

This is a java forum not a javascript forum