UpdateButton.OnClientClick = "return validateFun();"
// Call following function in client click event of Update Button
function validateFun() {
var rf=$get('<%= RequiredFieldValidator1.ClientID %>')
;
if (rf != null){
ValidatorEnable(rf, true);
ValidatorValidate(rf);
if(rf.isvalid==true){
var answer=window.confirm('Save the changes?');
return answer;
}
else
return false;
}
else
return false;
}