do some js stuff when submit post the button is clicked and then post the form

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i have a form with a <input type="submit"> in it
now i want to do some client side validation before the form is posted to its action url. how do i do this. thanks in advance
also i want to remove the automatically inserted fields __VIEWSTATE, __EVENTVALIDATION, as they dont serve me any purpose
so how do i do this

Posted 31-May-11 19:00pm

tihcra

Updated 31-May-11 19:03pm

v2

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_Damian S_ 1-Jun-11 1:01am

What kind of validation are you wanting to do? Why not use a validator to do it for you?

tihcra 1-Jun-11 1:04am

i want to count the number of checkboxes ticked. if they are less than a particular number post the form else display an alert

Sergey Alexandrovich Kryukov 1-Jun-11 1:05am

Not clear what validation.
--SA

tihcra 1-Jun-11 1:08am

i want to count the number of checkboxes ticked. if they are less than a particular number post the form else display an alert

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Kiran Sonawane · Answer 1 · 2011-05-31T19:05:00

Solution 1

you need to onsubmit on form tag. Look at below

<form action="http://www.devinrolsen.com/" method="post" onsubmit="return validate();" name="simpleForm">

In javascript, you need to write the function validate() which will return true if the form values are OK otherwise return false

Posted 31-May-11 19:05pm

Kiran Sonawane

Comments

Sergey Alexandrovich Kryukov 1-Jun-11 1:09am

Sure, correct, my 5, but look at the alternative I suggest in my solution.
--SA

Sergey Alexandrovich Kryukov · Answer 2 · 2011-05-31T19:08:00

Solution 2

Why not server-side validation? There are many benefits. It can be more flexible and easier to develop as this is .NET and C#. Javascrips usually takes more development time be the order of magnitude. With ASP.NET you can easily re-generate the same page with validation results and present it back to the user.

—SA

Posted 31-May-11 19:08pm

Sergey Alexandrovich Kryukov

Comments

tihcra 1-Jun-11 1:11am

i have read abt validation controls, i think u are talking abt that, but can i validate something so trivial as number of checkoxes ticked with it? can u give some example

(say) all my checkboxes have name attribute set to 'cbData'

tihcra 1-Jun-11 1:14am

also i am populating by checkboxes at runtime on server side. so how do i add validation control. plus my checkboxes are inside a div tag(with runat attribute set) and not inside form tag

Sergey Alexandrovich Kryukov 1-Jun-11 19:38pm

Put them all in form and submit POST, on server side check them all and count those checked.
--SA