Javascript - How To Do Validation Before Postback

Mar 28, 2011

I have custom control with ASP.Net validators.

writer.AddAttribute(HtmlTextWriterAttribute.Onclick, "javascript:return DoSmth();");

function DoSmth() {
var cBox = confirm("Are you sure?");
if (!cBox) {
return false;
else {
//Invoke validation

When I push button submit, I call confirm box. If I press cancel - all right. But if I press ok, I need to do validation. How can I stop postback and do valiadation?

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