如何避免在Jquery中验证几个文本框

Question

How can ignore some text box ignore for validation checking. Below code is applied for all text but I need to leave few text box blank, but due to the code I am not able to submit the form with optional text box. Kindly refer the jquery code which is used for validating ALL text box

<script>
$(document).ready(function() {
    $('#btnSubmit').click(function(e) {
        var isValid = true;
        $('input[type="text"]').each(function() {
            if ($.trim($(this).val()) == '') {
                isValid = false;
                $(this).css({
                    "border": "1px solid red",
                    "background": "#FFCECE"
                });
            }
            else {
                $(this).css({
                    "border": "",
                    "background": ""
                });
            }
        });
        if (isValid == false) 
            e.preventDefault();
        else 
            alert('Thank you for submitting');
    });
});
</script>

Answer 1

add a class on text boxes which are mandatory:

<input type="text" value="1" class="mandatory"/>
<input type="text" value="2"/>

and then:

 $('input[type="text"].mandatory').each(function() {


 });

FIDDLE DEMO