Question

When error message will come on validation if use have done something wrong then that error should be read by screen reader?
Any Screen reader compatible, accessible, unobtrusive jquery form validation plugin?

and how user will know which form field is mandatory?

my question is not about to make form with fieldset, legend, and label?

Answer 1

You can use the standard jQuery validation plugin and write your own validate() which collects the errors on submit and displays them in an alert(), rather than relying on showing and hiding divs/spans. alert() is considered to be screen reader compatible according to WebAIM.

http://docs.jquery.com/Plugins/Validation