Problem validation date jQuery?

[binboy]

I want create a validation for date i don’t know why output function `valid_date()` in ` $(‘.submit’).submit(… alert(valid_date()); … ` after click on button is `undefined`, how can fix it?

function valid_date() {

$(document).delegate('input.date:text', 'keyup change', function () {

var class_show = '.' + $(this).closest('div.auto_box2').find('div:last').attr('class');

$val = $(this).val().replace(/[^d]+/g, "").match(/d{1,12}$/);

var $this = $(this);

val = $this.val();

name = $this.closest('div.auto_box2').find('input').attr('name');

url = $this.attr('class').split(" ")[0];

filter = $this.attr('class').split(" ")[2];

var class_age = '.' + $(this).closest('div.age').find('input[name="age"]').attr('class');

if (filter == "limitdate") {

dataObj = 'limit_date=' + val;

} else {

dataObj = 'date=' + val;

}

$(class_show).empty().attr('style', '');

//alert(filter);

if (val.match(/^dddd/dd/dd$/)) {

var result = true;

$.ajax({

type: "POST",

dataType: "JSON",

url: url,

data: dataObj,

cache: false,

success: function (data) {

//alert(data);

if (data == null) {

$(class_show).attr('style', 'margin: 0 5px 0 0; color: #7E7E7E; background-color: #ffffec; height: 26px; padding: 2px 3px 0 3px; font-size: 13px;');

$(class_show).show().html('Is wrong.');

$(class_age).val('0');

$('.' + filter).css("background", "#ffc4c4");

result = false;

} else {

$(class_show).show().html('');

$(class_show).attr('style', 'margin: 0 5px 0 0; color: #7E7E7E; background-color: #ffffec; height: 26px; padding: 2px 3px 0 3px;')

$('' + data.date + '').appendTo(class_show);

$(class_age).val(data);

$('.' + filter).css("background", "#FFFFEC");

}

},

"error": function (x, y, z) {

// callback to run if an error occurs

alert("An error has occured:n" + x + "n" + y + "n" + z);

}

});

} else {

$('.' + filter).css("background", "#ffc4c4");

result = false;

}

return result;

});

}

//submit form ////////////////////////////////////////////////////////

$('.submit').submit(function () {

//ticket_check();

var passed = true;

alert(valid_date());

passed = valid_date() && passed;

//passed = autocomplet_valid() && passed;

//passed = ticket_check() && passed;

//passed = required_selectbox() && passed;

//passed = required_valid() && passed;

if (!passed) {

$('#loadingDiv, #overlay').hide();

return false;

}

});

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