Hi,
client-side validation library has a few methods for example ValidatorValidate (you can view them with reflector from System.Web.dll's resources and viewing WebUIValidation.js)
function ValidatorValidate(val, validationGroup, event) {
//there's some script here
}
1. so with javascript basically taking reference to the old ValidatorValidate() within a variable
var oldValidatorValidate = ValidatorValidate;
2. Creating your own ValidatorValidate
function MyValidatorValidate(val, validationGroup, event){
//first call the original one
oldValidatorValidate(val, validationGroup, event);
//Here you can check val.isvalid - e.g write your logic here, like check for the correct validator etc etc
alert(val.id + ":" + val.isvalid);
}
3. set new reference in javascript
ValidatorValidate = MyValidatorValidate;
Now when ValidatorValidate is called by client-side validation framework, it calls your MyValidatorValidate method, which delegates the job first to the original method, and then does its logic after the "base" method has done its job.
http://forums.asp.net/p/1282363/2454378.aspx