website building query-(html,javascript)

Now the problem with this website I am building is-
->In parameter section parameter type is a mandatory field if you put values in parameter name and dafault value fields. The javascript for that I have written in function isvalid1(). Now the id no in the javacript alert needs to be exact as it is on the html screen. But the alert that is coming has the total number of rows as id instead of actual id no.

Please check the problem asap and a well thought solution will be highly accepted.