using Jquery to show one error message at a time

I'm trying to show one error message at a time and then once that error has been corrected to show the next error.

For example there is validation on three textbox (Date, Month & Year) once the date textbox is valid then the month error message choudl show.

The code I have so far for this is:

var pi_ArrayValidationResult;
var pi_EachValidator = function(delegate) {
    if (typeof (Page_Validators) !== undefined) {
        for (var i = 0; i < Page_Validators.length; ++i) {
            delegate(Page_Validators[i]);
        }
    }
};

var pi_CheckValidators = function() {

    var fields = {};
    pi_EachValidator(function(val) {
        if (fields[val.controltovalidate] === undefined) {
            fields[val.controltovalidate] = true;
        }
        fields[val.controltovalidate] = fields[val.controltovalidate] && val.isvalid;
    });
    for (var field in fi开发者_运维技巧elds) {
        if (fields.hasOwnProperty(field)) {
            $('#' + field)
                .parent('div.fm-req')
                .toggleClass('fm-error', !fields[field]);

This section is the bit that needs modification, to show one error then the next once the previous error is corrected:

            $('#' + field).siblings('span').hide();  
            $('#' + field).siblings('span').each(function() {
                var $this = $(this);
                if (!$this.isvalid) {
                    $this.show();
                    return false;
                }
            });
        }
    }
};

return {
    init: function(args) {
        var fnOld = ValidatorUpdateIsValid;
        ValidatorUpdateIsValid = function() {
            fnOld();
            pi_CheckValidators();
        }
    }
};

If all you're doing is validating the input on three text fields, you can probably use the jQuery validator plugin with the built-in methods for date fields. Just override the showErrors handler to display the first error in the array in the callback args.

I'm not familiar with Page_Validators. Is that a .net thing?