Invoke client-side script after validation but before postback

Hi All: I have an web form with a submit button that posts back to a remote server.

I have some requiredfieldvalidator and regexvalidators that work fine; they fire the client-side validation before posting to the new server.

I have some additional JS validation that I need to perform only if the page validates client-side first. In other words, I want all the client-side validation to fire, and if everything is valid, I want to invoke one more client-side script before posting back.

Is there any way to alter the validation process so that I can execute some script after all the validators have returned "IsValid"? Something like (pseudo-code):

if(IsValid) {

//run my code

//submit()

}