Jquery Disable Button if Textarea is empty

by dying_sakura

HTML

<input type="text" name="textField" />
<input type="text" name="textFieldd" />
<input type="submit" value="next" />

JavaScript

/* Jquery Disable Button if Textarea is empty */

$(document).ready(function () {
    $('input[type="submit"]').attr('disabled', true);
    $('input[type="text"]').on('keyup', function () {
        var textarea_value = $("#texta").val();
        var text_value = $('input[name="textField"]').val();
        if (textarea_value != '' && text_value != '') {
            $('input[type="submit"]').attr('disabled', false);
        } else {
            $('input[type="submit"]').attr('disabled', true);
        }
    });
});