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Javascript - How To Do Validation Before Postback


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?


View 2 Replies (Posted: Mar 28 at 21:13)

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Ok, here is the Problem:In the same page, there is some asp:validator, e.g. and , and of coz, when the page run into error, this validator and callout will display to the user. e.g. When the user didn't fill in anything and submit the form, the ValidatorCalloutExtender will display a ballon and tell the user. Imagine one of this ballon/validatorCalloutExtender come out and on top of your screen at the moment.

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